I'd been looking for a watch that would give me functions like the Timex Ironman series of chronographs, but with the toughness and superior build quality of a Casio G-Shock.  Problem is, there aren't too many G Shocks that have functions that are suited for this.  Sure, most have chronographs and timers but they are basic.

Enter the G7700 (and the sister G7710 with negative display and gold trim).  This is a very unusual G Shock.  It boasts 29 world time zones, a dual time mode, four alarms, two countdown timers that run intervals with each other (perfect for interval training), and a stopwatch accurate to 1/1000th of a second with 99 laps.

The interval timers are terrific and will repeat up to 5 times (though I wish you could set them for more).  This makes it perfect for interval training.  When one finishes, the alarm will go off, the other will start, and red and green LED's will flash alternately for ten seconds.  This is invaluable for me. While the alarm isn't that loud, the LED's are bright when flashing (I run at night usually) so I can tell when the next one is starting even while listening to music through earphones.

The stopwatch also has a unique feature, a "countdown" till start, where the display will animate a 5...4...3...2...1...Start type countdown, with the LED's going from Red to Green at the start, sort of like race track christmas tree lights.  Cool beans.  I'll never use that part of the stopwatch but it's still cool.

The display is unusual in that the main Home time can display the year, or days past in the year with how many left to go, as well as day and week number.  I like this feature.  The watch has three 'lines' of display with the top two noticeably smaller.  If I had one complaint, it would be that these two top smaller displays are slightly harder to glance at while running, but this is minor.

Backlight is standard bluish-green on the face, however the backlight time isn't adjustable.  It lasts about 1.5 secs and will not stay on if you keep the "G" light button pressed.  Display contrast is adjustable which is something I've not noticed on  many G's.  This Casio module is impressive.  Hopefully they use this more often, rather than keep on cranking out the same old modules in different cases each year.