I have a Garmin solar instinct. I honestly don't use like half the features but a great watch. Keeps me honest on my daily step count which has helped me increase it slowly but surely.
Thanks for the input. So far it looks like Garmin is probably the brand to go with. The one I had that died was a Garmin but that was a long time ago. I have a few co-workers that suggested Garmin as well.
Battery lasts for 26-28 days depending on if you win the battery lottery or not. It has a battery saver mode that turns off most of the sensors which will almost double the life but will supposedly go forever if you give it 3 hours of sun a day. The GPS naturally eats the battery so I never really use it.
This is technically my 2nd one. I banged the first one against a wall really hard doing some stupid shit and the vibrating mechanism broke loose inside. It would rattle but otherwise everything still worked. Garmin swapped it under warranty no questions asked and even paid to have the broken one shipped back.
I have the tactical model so it can turn off all the features that causes lights that would show up under night vision. If you get up to any of that. Also has a stealth mode that turns off any part that gives off a radio wave. Cool, but if I'm being hunted by someone sophisticated enough to track me via localized SIGINT I'm probably long dead already.
I haven't found the compass very accurate and it needs frequent recalibration. Though that just might be my work as I'm often around powerful magnets.
The body sensors work great though and that mainly what I use it for.
If you want spend big $$$ they have a smart watch with a freaking ballistics computer in it. I almost went with that model but the watch face is fucking huge and I'm not into big ass watches like that.