There are 4 of us in our family, my 2 daughters use an Atom 2, and me and my wife use an Atom 3. We dive 2 trips per year, and I can find no fault with them. I do change the batteries more often as a precaution, probably 1/yr. The only time it messed up was when my daughter wore her wrist compass on the same arm and when she flexed her wrist, she was inadvertently pressing buttons and couldnt figure what had happened at depth, so we called the dive. The oceanic oceanlog software is a bit weak without a Mac version last I checked, but I honestly gave up on tracking with software and just use my log books now.
Great small computer IMHO