An article on G-Shocks has been posted over on a Jeep enthusiast site. It's basically one man's life story of watches.

Years ago, Timex was touting the Ironman as the watch that "Took a licking and kept on ticking" Well, I'm here to tell you that might not have been the case… over 2+ years I managed to kill 6-7 of em. Diving too deep, crappy dives off the 20 meter platform, impacts with snow balls (it did save me a nasty black eye), I just didn't have much luck. Timex was pretty good about warranties, but still… I wanted something I couldn't break.

Then I found out about the Casio G-shock watches, and I decided to try them. My first Gshock was a DW5600, which I still have. I liked the watch immensely, especially after surviving some dives and impacts that I know would have killed my Ironman. But the thing that killed it for me, even though it had been on the market for several years, was bad luck with batteries and battery replacements. Something about the screw-on back was alien to jewelers at the time, and my first three battery replacements resulted in a dead watch after going down to only 20 or 30 feet. I got a different G-shock eventually as one watch place stepped up after it died again, but I still like that first one

You can't beat G-Shocks for their toughness per dollar. There's usually no going back once you own one.

Link