CasioMen's Pro Trek PRG-270-1 Tough Solar Triple Sensor Multifunction Digital Sport Watch

Love the Casio Brand. Have three of them and two are solar. Wow, what a difference! Have cheaper watches with supposedly the same functions, but this beats them all in ease of use, accuracy and quality. Very much worth the difference in cost. Works great in all functions, with easy to understand and easy to use instructions. If you can get your hands on the .pdf user manual it's much easier to use than the small printed one that's provided, but the small one is better than nothing. Hard to believe this has been out since 2013. Where have I been all that time? But finally it's mine!

Altimeter, compass, barometer, map, answer phone, almost all bodily functions, including sleep info - also has several sports modes. You can change the face for sporty or more analog looks and it's tough. What does it not do? I'ld buy it again any time.

This is my third ABC watch; I also have the original 'Pathfinder' and a Suunto Vector. Here's a few reasons why which might help you make your decision to buy this:- This watch is just the right size; big enough to operate with heavy winter gloves but not comically large.- The response time from button push to readout is very quick with this third generation sensor, about a second.- Unlike my other ABCs, I'm not concerned with draining the battery by taking frequent readings because this one is solar powered. - The battery life is estimated by Casio at 6 years, based on # of charging cycles and battery 'memory'.- The auto-light which activates when I flick my wrist is nice for one handed viewing at night. I don't find it too bright. User can select 1/5 or 3 seconds.- I like having the Sunrise/Sunset data one button push away (bottom right button while in time mode). I find myself checking it every few days to observe how that cycle is changing.- Like other ABCs, it shows pressure trends so basic forecasting can be done (assuming true altitude has been relatively constant)- The altimeter is more sensitive and precise than my other ABCs. Like some other reviewers have mentioned I can raise the watch and watch the altitude readout change by ONE meter, then back down again.The altimeter is 'precise', but to be 'accurate' you must tell it the current altitude before you start your climb. These watches interpolate altitude from a pressure/altitude lapse rate formula. The readout will track that ratio perfectly accurately, but that lapse rate (m/milibar) is only accurate in a NOAA 'standard atmosphere', which is a nominal average. Real world lapse rates vary and so will your indicated altitude for various reasons (which are all interesting to learn about). For example on a colder than standard day it will read high, and on a hotter than standard day it will read low.This watch IMO would be a great tool for a child or anyone who wants to studying many interesting subjects, lapse rates, adiabatic cooling, pressure effects on weather, and so on. Calibrating the altitude is simple, press the set button and increment the readout to your current known altitude. Having to tell an ABC watch the altitude is not absurd, and works as follows: on a recent climb of Fuji my group started from the station 5 bus terminal which we knew to be 2,300m. The summit is at 3776m and there are huts every few hundred meters of elevation. It was nice to know how 'far' until the next hut, especially the one we slept at, and then how far to the summit. A simple calculation using the altitude and time from the watch such as 'the previous 100m took one hour' gave a rough estimate of ETA; which helped to keep the group motivated.After years of using these watches, I wish Casio would incorporate one feature which I call 'altitude lock' or 'base-camp lock'. If the user knows his/her true altitude will not change for several hours, he should be able to lock the altitude readout at its current value. Any attempt to use the altimeter would show "LOCK". Then, when the climb resumed the next morning, the indicated altitude would NOT have drifted up or down due to weather changes over the past several hours; it would not be any less accurate than it was the moment the watch was locked. The new Suunto Core might have this. But one can't have it all for about $100.For what I paid, $104.99, this watch is an incredible deal; especially since I won't be spending valuable time and real money on batteries for several years.

I got this watch as a replacement for a G-shock that only lasted me about 6 months before it quit on me.So far it's proven to be a very nice watch.To be honest, I don't use the watch to its full potential. I have no need for some of the functions, such as the altimeter and barometer, so I can't comment on those.It's a good size for me personally, kind of a medium sized watch face. Not the biggest I've seen, at the same time, I certainly wouldn't call it small. The thermometer works as expected. When worn, it reads a few degrees higher, because of the heat you're body is putting off. It usually gets the temperature close enough to what I use it for. If you need a more accurate reading, just take it off and let it sit on a table top for a few minutes, and it should be pretty spot on. I can't really comment on the accuracy of the compass on this watch, as I've never tested it with an actual compass. The one downfall I think this watch has is that when the battery starts to die, there really isn't a long period of time from when it tells you that it's low, to when it actually dies. Not a huge issue, however if you don't have a chance to get it into some sunlight to charge back up, the watch may die, and render the watch useless until you can charge it.Over all, a great watch. Durable, functional, comfortable, and I think it looks pretty good too!