I have the Suunto D4i. It is a very nice wrist computer. I was lucky enough to get it for half price as it was a dive shop display model. The functions are great and it is wireless air integration capable but I find that the display is just too small when diving. Instead of paying $400 for the air piece I went with the Oceanic Proplus3 with the compass. Nice big display and air info direct from the regulator. I do wear my Suunto as a back-up.