Update:  This watch completely died 2 months after I got it, and I was actually happy to have a reason the pitch it into the rubbish bin.  Because it was truly rubbish.

I got this because I need a calendar on my watch.  It has a nice, large display, but I'll often glance down and see that it has either changed from regular to military time, or else the stopwatch is running.  I assume it's because the 'buttons' to change these options are aligned along the edge of the watch.

Great idea, bad design.