Because of some recent messages here and some private messages I've received, I feel I need to offer a little perspective on the Cobalt computer.
This thread can give a somewhat misleading impression, because with Atomic not having direct email support, it became a default (and very public) support forum. Atomic has shipped to date thousands of Cobalt computers, and the Cobalt has been in production almost a year. The vast majority of users have had no problems- and many are buying a second or third Cobalt for family members. But a heathy percentage of those that did have problems ended up being discussed here. If the overall return rate were anything close to what some here have reported, Atomic would have a disaster on its hands. It doesn't. Right now, Atomic's biggest challenge is trying to produce more Cobalts to fill the backorders. That said, any new, complex device will inevitably have issues that don't turn up until there are many users, as early adopters well know.
For the Cobalt, these were in two areas: buttons and batteries.
With the early production, there were a few bad battery door seals that resulted in leaking- and therefore Atomic has been very proactive in getting back any computer that we even suspect might be showing signs of a possible leak or battery failure. When investigated, most have in fact had no problem, though often the battery was replaced just to be sure. The production issue was addressed and the problem disappeared.
The other issue that hit a lot of computers were buttons that didn't work as well as they should. Atomic took a lot of these back for adjustment. We have since modified the switch position on the board, and worked with the switch manufacturer to get tighter tolerance on the sensitivity of the reeds. This issue took longer to effectively address, but I'm quite confident this problem is now fixed.
Both of these problems did not come up as big issues until we had many production Cobalts in the field, as they were not common. A few dealers got a number of these computers though, that could explain why some report a high return rate. These two issues account for the large majority of all returns to Atomic.
There was one problem that turned up with an electronic component that was out of its published spec- we were able to eliminate the issue with a firmware change, but until that was released there were a very few computers that shut down after charging and would not wake without a hard reset. It was just too rare and intermittent an event to have come up in testing.
Apart from the three problems listed above, I don't believe the problem incidence with the Cobalt itself is any higher than other sophisticated computers.
The other major complaint here has been the shortcomings (and especially the late-coming) of the Atomic dive logging software, and these are legitimate. However, to their credit, Atomic has given complete and eager support to anyone who is interested in developing dive log applications that download from the Cobalt, and has directly supported the libdivelog open source drivers project- to my knowledge the
only significant equipment manufacturer to do so. As a consequence, both MacDive and Diving Log (for Windows) were compatible with Cobalt before Atomic released their own software.
The door is still wide open for anyone else interested in developing an application. As I've said here before, I believe third party developers are always going to produce dive software that is better than anything manufacturers come up with. Nikon and Canon may make great cameras, but most of their customers are not using their photo software- I believe the same principle applies here.
On the plus side, if you are someone who cares about user interface design, the Cobalt has some real strengths. There are other computers that have menus, and colors, and comparable feature lists, but in themselves those features don't make for a good interface. It's very hard to make something easy to use, and a lot of effort went into the interface design of the Cobalt. People really can use it out of the box, without the manual, without specialty classes. Some people (like me) really care deeply about user interfaces, and are driven crazy by bad or indifferent design. But others (including many engineers) have this aspect go right past them and don't care. The interface design is the Cobalt's strength, and this doesn't show up in feature lists.
Atomic has also demonstrated extreme responsiveness to user requests (ahem, case excepted...

). Quite a few firmware features were initiated on this thread that are now in the shipping product. People have been waiting years for announced features from other manufacturers, so I think Atomic deserves credit there as well.
I'll continue to provide as much support here as possible, but I'm pushing Atomic to set up a dedicated support service on their website- I believe that will be a better place for carrying out this function.