I bought it so I could have the ABC features and not have to worry about running out of batteries and so far so good.
There are a lot of features in general so it takes some getting used to everything but becomes fairly intuitive after a while.
I've used the watch on two outings where I wanted to measure altitude and use the compass. I set the altitude to the known elevation start point of my climb and when I got to the top the high point elevation was spot on so that was nice. It also has a feature which will automatically track your total vertical gain and loss and give you high/low points. There are a few involved steps to set up on the watch at first but again once you figure it out its pretty easy and a very cool feature. You can do some of this manually as well and I compared my manually saved elevations/gain/loss to the auto function and it was pretty darn close.
For the compass, I was able to set the declination and it takes pretty darn accurate readings. Not as good as a mirrored compass but you can be pretty accurate.
The temperature gauge reads too high when you have the watch on your wrist (I think this is true of all watches w/ temp but not positive). But if you leave it off your wrist it seems very accurate. A bit of a trade-off. If youre relying on the altitude the manual says to leave it on your wrist as temperature affects the readings BUT if you want an accurate temp you have to take it off.This seemed like one of the better looking casios and is slimmer than some of them so thats why I chose this exact model and the compass w/ the duplex bars is nice but I think any of the triple sensor casios probably work just as well.I wish the countdown timer would auto restart but it does not. Some of the other casios restart automatically.
I've had my Pathfinder PAW2000 watch for about 2 months now - it has a nice, large face without feeling bulky on my wrist because it is super thin and reasonably light too. The Altimeter and time keeping has been absolutely accurate - I have not needed to recalibrate the Altimeter or Barometer on the PAW2000 like I have had to on other Altimeter watches in this category. I like the intuitive controls, clear digital display and overall looks of this watch. To get a better feel for the PAW2000, check out the video posted on this page. 5 out of 5 stars without question.
Look ... Casio wrote the book on ABC watches and the 2000 does it as well as the rest. But ... this one LOOKS the best of all Casio models. You won't look all nerded out if you strap this on in a "business casual" situation. As for the function ... buttons are fairly easy to manipulate and overall operation is pretty intuitive. You still need to read the manual, which is a chore for those of us with older eyes but just deal with it ... you'll be happy you did.
I bought my pathfinder to have both the barometer, altimeter, thermometer and compass. Worked very well to check updates on low-pressure storms swooping in quickly in winter in the Inside Passage between Alaska and British Columbia. Saved my a** a few times. Even though this behemoth of a watch takes up like half my forearm (being 5'1" 98 lb female) it's worth it. Casio does however get my award for just another company that, in making watches with all of these functionalities only for men versus as well as women, suck.
It's a great watch. It may not be as accurate as more specialized equipment but for backpacking/mountaineering/kayaking, it's more than enough. All the features are useful once you learn how to use them.
More importantly, it's very comfortable on your wrist despite its rather large size. Also, since it uses a rubbery strap material, it doesn't absorb sweat like other straps, which would usually lead to a smelly wristwatch. No problem here. I'm happy with my purchase.
Had this watch for about 6 years and wore it everyday. Recently broke it after a 15 foot fall on to a concrete pad and that also fractured my skull and a vertebrae. Loved the feature that that would reset the time every night. Now I'm debating buying another one or trying out a new brand but definitely recommend this watch to everyone.