I purchased a ATOM 2.0 before leaving on a trip to Maui. Prior to that I had an older oceanic AI computer. Overall I prefered the older computer that I had to this one. So far the ATOM has been nothing but trouble. The older computer was much easier to configure compared to the ATOM, and I could figure out everything without needing a manual.
Another issue I have is that it is easy to reset the ATOM if you are programing it using a PC. While on vacation I decided to hook it up to my laptop and enter in the settings for my buddies transmitter. I hooked up the computer, loaded the program, typed in the info for the 2nd transmitter, and than saved the info. By doing this I basically over wrote the settings for my transmitter, no warning message about this. What I realized later is that I should have downloaded from the computer, than typed in the info, than saved it back. So there I was on the beach trying to read the manual and reconfigure the comptuer to my transmitter the next morning. I couldn't figure that out using the manual and ended up aborting the dive. I have also had trouble with configuring some of the other settings using the manual, seems either there is something wrong with the watch, or the manual doesn't match the computer.
I suspect that the watch has some issues and spoke to the LDS that I purchased it from. I'll be taking it back to them later this week to see if they can figure out why some of the settings cannot be changed. Hopefully they'll be willing to just exchange it for one that is more user freindly.
For those that are curious I am computer literate, and tech savy. This watch could be more user freindly IMO.