I have not used one, and while it is very cool, I can't see any reason to spend $1200 on a dive computer unless you are a professional and would be diving a few times a week, year round. And if I were going to spend that kind of money it would not be on this computer. It looks like a toy. It is HUGE and would be in my way all of the time. I also think uploading photos to your dive computer is kind of stupid. I would rather see a decent computer that comes with amazing software for the PC/MAC that does some really awesome dive logs with photos, maps, etc.
Just my opinion of course.