CasioPRW3500 Series | Pro Trek | 100M WR | Compass | Alt/Baro-Thermo | Tough Solar Power | Atomic Timekeeping | 1-100 SEC Stopwatch | Countdown Timer | World Time

Bought it exactly 4 years ago (2020) albeit for $160 while on sale. This has been my daily "driver" and I don't baby it (nor abuse it)- swim in the ocean all the time, go hiking, etc. Do rinse it after salt water exposure, but am surprised all the buttons still work and not gotten stuck.Backlight is excellent, display very easy to read in (or out of) the water. Never ran out of battery (solar charging). Barometer/Altimeter and temperature sensors are the main reasons I bought it for all my activities. Only wish it had tide tables, but otherwise this has been the perfect activity watch.Replaced the wrist band recently, other than that it works without issues. Barring some minor scuffing/scratches around the bezel, it even looks good still. Zero scratches on the crystal, probably due to the raised "lip" (crystal being recessed well below the bezel) that takes all the beating. There's occasional fogging of the crystal (due to temperature changes?), but seems to be common with all Casio watches I've owned.Will definitely buy another one (or the upgraded version), especially when it's under $200 again.Was considering upgrading to a quad-sensor Gulfmaster with sapphire crystal (GWNQ1000-1A), but seeing the condition of the used ones on eBay, which all seemed to be severely scratched up, decided to keep using this one till it dies. Seems Casio just hit the jackpot with this ProTrek for quality finishing (ion-plated) vs. a more expensive Gulfmaster that ends up looking like schit...

Purchased July 28, 2025 for $229. That was the lowest price anywhere. I was worried I would have to return the watch because the spec's say the case diameter is 55mm (a hair over 2"). Not sure where that dimension was taken because the watch size is good. The watch checks for correct time - between midnight and 0200. The watch does a great job. Good value overall.

If I could only have one watch, it would be this one. I love this watch. This is the watch I wear all day no matter what I am doing. I have gotten paint acetone, automotive oils and greases, detergents, and all sorts of other substances on it. I have banged it against countless objects. I truly unapologetically use this watch. Here are the det's:Comfort: This is the most comfortable watch I have ever worn. This watch doesn't start to weigh on your wrist, get itchy, or make you feel like you have to shift it around from time to time. I wear it all day. I have even fallen asleep with it on.Durability: I am impressed with the amount of abuse this watch takes. There are some expected scratches, but even the wrist band and buckle are holding up well.Charging/battery: This is always on hi, even if I wear longs sleeves. It gets plenty of charge just from driving around or being outside for a bit.Functions: I had to calibrate the thermometer when I got it. It isn't going to give you a good reading on your wrist. It will pick up your body heat. I have found it accurate when it is not worn. Other functions work as advertised.Screen/reading: I have the autolight function enabled so it turns on briefly when you aim your wrist at your peepers. It can't be read well in the dark without it. The light is bright enough to read the full display. The light button is easy to locate and press with no light. In normal to low light, it is very easy to read. I prefer this display instead of the light back screen with dark numbers, like the previous model. But I'm sure that is subjective.Buttons: Everything is easy to press and find. There is a lot of texture on the buttons. Even with gloves on, it is easy to operate.To sum up, this is a quality watch! I won't go on about all it does and the size, that info is in the listing. It does what it promises and does it well. I would highly recommend it!!

I really like this watch. I have always wanted a watch like this and finally pulled the trigger and got this one.This watch looks very nice. The numbers are very easy to see and the time is very accurate.The main features (Compass, Barometer, Temperature, Altimeter), work great. Although when taking a temperature reading on your wrist, it will not be accurate. If you are out and about in the elements of mother nature, having the thermometer close to you, or on your skin means that you can keep an eye on your temperature and avoid large changes in your body temperature due to the weather, if you want an accurate temperature in an the area you are at, you will want to remove the watch and let it sit for about 5 minutes and then take your reading. The compass and altimeter seems to be spot on, after I calibrated them (which is very easy to do). The Barometer is fairly accurate as well, it can alert you when the pressure changes significantly. Sunrise and Sunset data is also accurate, however you will want to adjust your latitude and longitude in order for that to be accurate, or else it will just use the sunrise and sunset data based off of the timezone you are on, adjusting the latitude and longitude is very easy to do. I did need to adjust the band, I took two links out, fairly easy to do yourself (I thought it was). When taking the links out, there is a small collar that goes around the pins, very easy to miss. If you put the pins back in without the collar, the pins will slide back out. So be sure the pins get put back in with the collar when taking the links out. The alarm, stopwatch, and timer work great, so does the LED back light. And I like the fact that I never need a battery, it charges via any light source. There is a power saving feature for this watch, when enabled it will extend the battery life if left in storage by shutting the display off and it will also shut the display off at night when it senses it is not in use, I disabled it for the time being because I do not plan on taking this watch off and storing it anytime soon. This watch looks good, feels good on the wrist, and ready for an adventure when you leave the office.