I recently got an Atom 2.0 w/ transmitter. Have logged about 8 dives with it and absolutely love it!! before it i used either analog gauges or non air integrated suuntos. the suuntos were ok but having them on the console was a major PIA in my opinion. the wrist mount works a LOT better for me and the small size of the Atom 2, compared to "hockey puck" sized computers, is much more comfortable for me. It is a very nice computer, i don't think you can go wrong with it.
I have to say, for me, it took a while to get used to the screens and the way the information is organized, the settings and such. and the manual was pretty intimidating. but once you read a little and take it out on a dive it is much easier than it seems. any computer will have a learning curve associated with it, it just a matter of getting used to it. and unless you are doing nitrox or deco dives the defaults settings are all you will need.
in fact, what i found out (after reading the manual), is that you can pretty much take it out of the box put the transmitter on your reg and take it out on a dive, without ever touching a button (other than turning it on; it comes on a "hibernating" mode from the factory to conserve battery power) or reading a page on the manual and it will safely take you through a regular plain-air dive, safety stop and all.
CHEERS and safe diving!
-W