This is an excellent watch for outdoorsy types, especially for those who sail, kayak or surf. With a compass, barometer, thermometer, and tide/moon tracking, it provides essential (potentially life-saving) information in an easy to use package.
The compass is seems accurate and is easy to calibrate. It is ideally suited for emergency navigation and for casual use such as trail hiking and river boating. I'm not sure I'd want to use it as my only compass for serious hiking or over the horizon boating, but perhaps that's just my distrust of electronics in mission critical environments.
The barometer is a little more hit-or-miss. It's accuracy is questionable given its fluctuation with altitude or temperature. This is not a Casio problem - it happens with all barometers especially wrist-mounted. Despite these issues the barometrer does a fair job of tracking the trend over the last 24 hours. Serious moutaineers may miss the multi-day tracking and using the barometer as altimeter, but most will appreciate it for the simple data it provides. I wish there were more display options, like a large multiday graph option for instance, but the small graph is fine.
Temp fluctuates when this is worn on the wrist, but not too much - perhaps a couple of degrees hotter than true outside temperature. It may be less accurate in cold temperatures than hot, but I'll have to wait a few months to test that theory.
The tide and moon features are what make this watch unique among triple-sensor watches, so I imagine that will be a key selling point for most. Both work well enough, though they will not replace a tide chart. The tide graph shows the general point in the cycle, but not with great accuracy. It's really only possible to estimate high tide with an hour or two. It would be nice of the actual hightide time were displayed or at least the graph had greater specificity. The moon tracking is a nice touch, since it allows one to estimate the size of the tides (spring and neap). But it's only an estimate - the watch does not tie moon and tide data together, leaving it to the user to figure it out. Some other tide watches actually have charts built-in that provide much more accurate data for particlar beaches, but are limited to limited spots. Since the Casio use longitude and other data to estimate the tide, it is less accurate for specific spots but more usefull overall. The ability to forcast the moon phase days in the future, but not to do the same for tide, leaves me wondering what they were thinking.
Other features of the watch include a countdown timer, stopwatch, and five alarms, which are all just fine. The five alarms cannot be set by day, but I suppose if you want to set a time for each day and just activate it as necessary that does the job. If you use the stopwatch and coundown timers frequently you may find switching between the two annoying, since they use the same function (you just set the the countdown timer to zero to put it in stopwatch mode). Also there are no lap-timers.
Downsides to the watch basically boil down to compleixity and size. While the watch is pretty easy to use once you get the hang of it, it is not entirely intuitive an all screens, and requires some memorization. Setting the tide data requires far too much research on the internet, and casio should provide better data either in the manual or on their website about how to set the data for most large coastal cities and popular recreation areas. The size of the watch is HUGE. It is larger even than the Suunto watches with similar features. The biggest annoyance I have with the size is the height, which is made unnecisarily taller by the rotating bezel. But for some the size won't matter (some may like it) so it is really a matter of taste.
Overall the eatch offers a great set of tools for most casual uses and does it at a very reasonable price. I recommend it to casual adventurers unconcerned about the size.
Click Here to see more reviews about:
Casio Men's SPF40-1V Sea Pathfinder Tide WatchProduct Description: The innovative Casio Men's Sea Pathfinder Tide Watch #SPF40-1V features a digital gray dial face with a durable mineral dial window. Embellishing the dial are an easy-to-read time display and a handy day-and-date calendar. Other high-tech details include a tide graph and moon-data option. Adorned with directional coordinates, the stainless steel bezel features a bearing compass feature. The 51-millimeter case is made of high-quality resin. To ensure ease in your day-to-day wearability, a black resin band is secured by a sturdy buckle clasp closure. Perfect for outdoor adventurers, this stunning timepiece brings a sporty finish to your look. It is powered by digital-quartz movement and is water resistant to 330 feet.
Buy cheap Casio Men's SPF40-1V Sea Pathfinder Tide Watch now Get 36% OFF
I had been looking for a watch for my sister for some time because she has a large wrist. This band gives her wiggle room and she can see it clearly at work. Thanks Amazon.
Just received the PAW-500T. It is a nice watch, cheapest on web from Amazon.
This watch looks nice in the photo online, but the reality is that this watch looks very different physically, it is not as attractive as I saw it online. It is not what I have expected by just seeing it on Amazon. Many of the details does not match. I learned that the next time I better go to a store to see it before I buy it online. 
Here's my opinion of this watch after several months of ownership:
This is an excellent watch. The watch feels solid but the band is extremely light weight(may be a plus for some). I purchased it because I needed a watch with a timer. The only complaint I have with the watch is the display cannot be seen under the analog hands so I have hard time seeing the remaining time on the timer.
This is a good, solid product with many features such as chronograph, alarm and 200 meters water resistant for which other manufacturers charge a lot more. I did qute a bit of research and did not see anyhing with the same features comparable in price. 
I am a diabetic and use a watch with multiple alarms to keep me on schedule. My Citizen Nighthawk had broken for the fourth time in the ten years I've owned it. Rather than spend the $125.00 to have it repaired again, I decided to look for something to replace it. Of the dozens of watches I researched, this one came up with all of the features I was looking for at a very reasonable price. So far, it's working fine. Check back with me in a couple of years, to see if I'm still as happy.
Although this watch is "only" a Casio it is simply an amazing and elegant timepiece. For under $60 dollars the watch looks like it costs at least $100 more and has tons of features to keep any technophile content.
I bought this watch based on several of the reviews listed here.I recommend that you think of this watch as having an analog display with the capability to displaying digital information in the background.In most cases, the background digital information is hard to read unless you hit the illuminate button.This is great for me because it gives the watch a classic analog look while having all of the capabilities of a digital watch when I need it (which is relatively rare - I generally just need to know what time it is).The watch is full of features. I can confirm that the thermometer does not give accurate readings when you are wearing the watch.
I like inexpensive sports watches.I can't bring myself to wear a watch to impress, and can't imagine wanting a fancy (and expensive) one.I'm like my dad: when it comes to watches I prefer function to form.I like the digital time, the digital timer and the stopwatch.Unlike my dad, however, who for several years (to my mother's chagrin) wore a calculator watch everywhere he went (God rest his soul, I loved the man), I do like it to look good.