I like everything about this watch ( thin, lightweight, easy to read ) but the knob catches on many items of clothing.  This often pulls the knob out, which stops the watch, unbeknownst to its wearer.  The result is you can't trust it to tell the time, which is a bad thing for a wristwatch.  I have had it about 6 months, probably found that it had stopped 20 times or so.  A few times I was aware of it, usually not.  It has always been just the knob getting pulled out, presumably by clothing ( because I've seen it happen ).