OK, I started to get a bit anal about finding the watch I wanted - I went through 10 watches, and returned them all - except this casio GR3500. I won't write negative reviews about the others, it's just that they didn't have what I wanted - this one does.
I travel a LOT. So first and foremost, I needed a watch that could deal with multiple time zones easily. I needed to be able to set them easy, and view them easy. Also:

  MY needs, pretty much in order of need:
Dual (or more) time zones
Date display (and day would be nice)
Appearance
Readable at night
Durable
No battery (auto or solar)
Atomic setting
Waterproof to at least 10 atm
Stopwatch

This watch did it for me!
Actually, what I really wanted was the citizen Skyhawk - I liked the steel/titanium band - but when you have dual time, you don't get the date in your home city - WTF?!

So I bought this casio - and LOVE it.
Some notes:
- I was leery about the resin band - but it's pretty comfortable, and I like not having to take it off when I'm at the gym in the shower (I wouldn't wear my leather band in the shower...).
- The atomic function resets the watch almost every night - actually if it worked once a week, I'd be happy, but it's almost every night -- while on my hand in bed. (I'm near Washington DC)
- The LED Light works like a freaking charm! In addition to a button on the watch, it can be set to automatic, so when you look at the light it turns on - it actually works! Works really well! I had another timex that was supposed to do that and it sucked, I had to practically break my wrist to get it to work... this is bizzarly great (when I look at the watch, the light goes on, but only at night - awesome :))
- Dual time function works great - it's actually 3 times - the main hands, the 3oclock dial is another, and then the LCD is another (but I have the LCD normally set to show date)
- The grey on black LCD is a bit hard to read at first, in low light it doesn't show all that well - I wish that was better, but not a deal breaker - that's about the only negative. In normal light though, I actually like the look, and it's very readable.
- Bottom line is that after 10+ watches, this one stuck. Good job.