I've had this Perpetual Chrono two weeks and am pretty stoked.  I have always had a Citizen or Seiko divers watch for my ocean sports and looks.  I just sold my Citizen BN0085-01E because it didn't have a Day just Date.  I also wanted to get a Citizen Eco with a better rubber strap.  The rubber strap on the atomic chrono is absolutely a perfect fit.  I suggest going to a watch repair person and having them size it to the T.  If you are mechanically inclined and have the proper tools, go for it, but make sure you measure and cut slowly.

The Atomic Chrono is silent, doesn't need winding, and will run itself.  It keeps perfect time via a radio signal.  When I take it off, the time keeps, but the second hand stops until worn again.  Press the top button and it re-adjusts to the second.  When you set the Atomic, you will be guided by the cd. Watch it.  It answers all your question quick.  You need to know how to account for daylight savings in your time zone.  The Tachymeter is static, it doesn't rotate. Another cool feature is checking the watch power.  I do it 3 times a day!

It is an incredible time piece.  You will look like you are a world diver even if you only go as deep as 9' in a pool.  Incredible watch by Citizen.

Updated: 4.16.2013 - I have never had a band like this.  Metal clip with rubber strap.  I paid a watch keeper $10.00 to cut it and size it, the best thing to do for  a perfect fit.  Clips on fast, comes off quick.  Really the best watch ever.

Updated 8.18.2013 - band broke.  Too bad the rubber/silicone didn't last.  The watch is awesome. ..the band just isn't durable.