I got mine and one for my son in September. They are the "new" ones and no, we have not had any issues at all with them like what was previously going on with the first ones. One thing that did happen with the one I got is that when I set the time it would creep fast real quick. That is to say that I set the time and in less than a minute it was a minute ahead. After 5 minutes it was several minutes ahead. This was new out of the box and as soon as I charged it fully it held the proper time and has not done this since. My sons, the other one, has never done this and now 4 months later still zero issues on either one. I was worried about this initially as a dive computer first and foremost has to have an accurate clock.
I like the Cobalt II and there is only one thing about it I would change if I could....the cloth strap thing that comes with it to attach it to your BC is on the high pressure hose and it doesn't stay in place. If you use this method to attach the computer slides ahead and doesn't stay close to your BC when not in use. It is also about three inches long or so which places the computer even further out from you and further yet if you attach it with a retractor. As far as "what I would change"...the slot in the top or front of the computer is long {it goes all the way across the comp} and too thin to get much on it to mount it there, like with a ring and snap. If they just would have made the opening or gap slightly wider so a snap or little bit larger split ring would have fit and not stood out instead of being small and tight to not allow even a small split ring to lay down while in the protective cover it would have worked perfect.
I can post photos of what I am talking about if anyone wants to see it better to understand. I really like Atomic stuff and most of my gear is Atomic...but they seriously "missed the boat" with this issue. I guess many divers wont find it a problem, but when you have a company that is making the claim "stop looking for the best, it's here" and such, then you see this kind of simple little thing it makes you wonder "why" they could miss something so simple?????
Edit: in all fairness to Atomic, maybe there is some special attaching method that actually fits the extremely pathetically way too thin slot that at first glance caused me to wonder why even bother to put that useless thing on it. I just measured the slot, it is 1/8" wide.