I have owned this watch for just over a week.  My initial impressions were quite positive even if it seems a tad overpriced for the feature set.  Then I took it with me for an evening run.  It is obvious that the folks who designed this watch did not really consider those of us who run when it is dark out.  I have owned more sports watches than I can count and I have never owned one with the flaw that this one has.  The issue?  The illuminate button is the same button that stops the chronograph (stopwatch).  So, when I am out running and I want to use the light feature to check my time, it always stops the chronograph.  In order to resume, I have to hit the start button.  So, what on every other watch w/ a chronograph I have ever owned is a simple process of pressing one button to view the stopwatch time in low light becomes a two step process.  First, I have to hit the illuminate button, which also stops the chronograph.  Then, I have to hit the start button to resume the chronograph.  This is a major design flaw that makes this watch hugely inconvenient as a sports watch. This is especially frustrating given the relatively high price.  If you are looking for a good sports watch, spend your money on a Timex Ironman or Casio G-Shock.  On those, you can easily check your time without stopping the chrono.  Plus, for this price, you can get a much nicer watch with higher level features.