I have 9 computers. Two of which are Cochrans. One Commander nitrox, one Nemesis IIa. Of all my computers I love the commander the best. So does my better half.
Large display, easy to locate info, gas switching if I want it (I prefer tables, but its cool when the tables and the computer match up). I have almost 800 dives on it, max depth 262 ft., and have never had a problem cept for the occasionaly low batt warning. They are easy to change batteries out. No floods, no erroneous deco times. By the way, the back lighting eats batteries. Speaking of which, the red back light sure is easy to read at night.
The Nemesis gives you TONS of information. Being an gas integrated model it tells you air consumption and how long your tanks will last if you are honking on them. The tap it till it comes on feature is a little tricky to get used to at first. After you master that it is easy to fire it up. The hand held programmer is nice as well. What I don't like is the fact that you have to have your arm relatively close to the sending unit, or it will flash. Most annoying. Even though this computer uses 3 gas mixes, I've never actually used it. Again, I prefer using tables. Of all the computers I have, this one probably gives out the most information regarding a dive. Again I've never had problems with it.
Come to think of it, of all the "horror stories" I hear about Cochrans, I have never seen one actually crap out on anyone.