For the price, I think this is one of the best watches Casio makes. Here's why:
The watch looks better than the pictures you see here. The blue highlighting on the case is darker and more subtle. The black part of the case has tiny embedded metal flakes and a luster that makes it look more like ion-plated metal than plastic. The backlight lights up the entire face with a soft orange light that has great contrast and won't ruin your night vision. The case measures 43 mm, but the cutouts for the pushers, and the bezel styling, make it look smaller. It doesn't have the bulky, overwhelming look of the G-Shocks and the low weight means it rides lightly on your wrist.
The tide function is improved compared to older Casio tide watches. Older models required you to enter the "lunitidal interval" for your location if you want an accurate tide readout. This watch only needs the time of the first high tide of the day, then it calculates the lunitidal interval and stores it internally for all subsequent calculations- it's a one-time setup. Also, unlike older Casios, this watch displays the relative height of the tide, indicating higher tides near the new and full moons. Note that the tidal model used by this watch is fairly simple and its accuracy depends on how complex the tides are at your location. It is more accurate for the east coast of the US, and less accurate for some locations on the west and gulf coasts. Check the tide graphs on tidesonline.noaa.gov and compare them to what the watch is telling you before relying on it.
Other features I like are: a stopwatch that measures a full 24 hours, dual time display that shows foreign and home city simultaneously, five alarms (a little louder than usual), and a 24 hour countdown timer. The solar charging function easily keeps the battery full, and avoids the expense of battery changes, and breaking the watertight integrity of the case to perform those changes.
Overall, I think this is a great value in a watch. It's hard to believe how much functionality you get for the price.