As a fellow CAT S41 user, I can confirm that the phone is basically invulnerable to dropping, although one of the rubber pads did break off after a couple years of opening and closing it. My compass doesn't work, probably due to exposure to strong magnets. Gps and cellular internet still work perfectly, I can browse modern websites and watch youtube without much trouble. The battery lasts forever. The camera is kinda meh and I regret not getting the variant with a FLIR camera.

If they can make the flip-phone variant hardy enough to play football with I'll definitely buy it. But chances are, my S41 will still be working by then ;)