As far a watch for work and activities goes, there is no superior to the Casio F-91W. It's virtually invincible. I'm in the UK forces and I, with countless others wear this watch as it's so reliable and does everything you could want. I've swam with it, dived with it, gone neck deep in mud with it, been in below freezing temperatures for days, got oil on it, scrambled on rocks, covered in grit, in salt water for prolonged periods and yet it still goes on!! The battery life is amazing as well. All my friends agree this is the watch to have. Others have had supposed 'rugged' watches which have broken in half the time. Sure, have a fancy watch for events and going out but this watch cannot be bettered for the working day. the only reason I'm on here buying another is because I lost it after years of it putting up with me. In the 1 in million chance that it does break (or more likely, you lose it) it's only £8.00 to replace. It's unbelievably good. The only thing that could be better is if you could keep the backlight on whilst changing the alarm time, which is a little annoying trying to set an alarm in the pitch black (but I just learnt the sequence of beeps after a while!).