I think roomwars looked graphically very good but it wasnt a good game, although that is due in part to how slowly it ran on my machine it was something of a bore waiting for the screen to refresh. I'm sure it ran fine on the test machine as the quoted spec was quite high.
I had the same problem with Operation Invasion Evasion in that the gameplay was very slow for me which spoilt the fun.
I haven't played any others yet, but I have read the review for my own game (Extranjero) and felt that it was a fair review.
2Ghz, 512mb, GeForce 2 MX.
timer() rules.
God created the world in 7 days, but we're still waiting for the patch.