I have the 512mb version of that same card, and it works well with source games. I run 1400x900 highest settings and average around 40-45fps without any severe drops in frame rate. It runs cool and quiet, and while it's not the best card around, it works fine for me. The really nice thing to me is that it draws very little power, so it works well with computers with cheap/small capacity power supplies.
That said, I don't think that it's a card really capable of some of the higher demanding games, like Crysis. It meets the minimum requirements, but you'll have to run it on low to medium settings to get tolerable frame rates, and that sort of defeats the purpose of Crysis, right?