I really like the style of these watches and have bought several because I can't find anything else similar - but they seem to be very poor quality and don't last long.  I've bought 3 of the watches.  The first one leaked swimming, even though they're supposed to be waterproof. (I threw it away, probably should have saved it and tried to get a replacement but I figured it was a fluke.)  The next one simply stopped working in a couple months for no apparent reason.  I now have a third, we'll see how long it lasts.  I also bought one of the zipper pull versions with a clock and light to put on my keychain, and the clock went blank within a couple days even though the light still works.  I know they're cheap but that's ridiculous.  For a few bucks more you could get a cheap Timex that works much better.

Another thing about these is, they can't deal with the pressure change on an airplane.  I always discover it has reset itself back to 12:00 sometime during the flight.