My chief 2 complaints about the Obsidian are:
1. The black pieces are darned hard to distinguish on the black squares under typical household indoor lighting. They sort of fade into shadow so I seem to spend a lot of time having to take second looks at black's positions: Is that a knight or a rook? A dedicated short table next to a lamp corrects the problem, but so does buying some rosewood-ish travel set pieces.
2. The settings never seem to stay where I want them. Most of them, anyway. In particular, the Easy setting, which is always shutting "off" when I turn off the computer. (Easy is the setting to tell the computer to think only on its time, not on my time. It doesn't mean I get an easy game ).
All-in-all I'm happy with it. I live in an area where there aren't that many chess players, surrounded by miles and miles of nothing but miles and miles. I have a job that keeps me looking at a computer screen 11 hours per day. Last thing I want to do when I get some time at home is look at a computer screen again, just to get a game of chess.
Obsidian doesn't replace human players, but when I want an OTB game where I live, I rarely have any other opportunities. I'm overall happy with it.
novag obsidian =average to strong north american club player...it is not at all that strong...around 1900 real ELO..Mephisto master is very strong it is expert level though not really a human master..but not too far from it specially in tactics..in building up position strategy it slightly falls behind though i got the mephisto milano pro=master chess..same software..and its delightful risky play style but i get equal or even beat it occasionally and of course lose as well...true i think much more than the machine!
Interesting you should say so. My previous comment was actually based on the idea this thing was equivalent to the old Novag Diamond. Mistake on my part, but this many years later there is no reason why it should be weaker. Still, if you have personal experience that it is, I guess it is.