It is good to see someone be so open minded.Since you can go the manufacturer's documentation and see that it runs a proprietary deco algorithm and will actually lock the user out if it's unhappy, it hardly seems necessary to take one on a dive before writing it off.
I have a student who needs a computer suitable for occasional accelerated deco dives. It turns out there are a couple of quite cheap ones available (£150 or so) that don't seem to get a mention on SB or on Andy's list.