Good game. In my experience, if you meet the minimum specs, you should be able to play it, although not as well as with better specs. The CPU specs are actually pretty important, too. My laptop has an 8600M GT with 256 MB VRAM and a 2.2 GHz Core 2 Duo, versus the 8800 GT with 512 MB VRAM and 2.4 GHz Core 2 Duo that's the official minimum. I could play on small servers (up to 12 people or so) with somewhat acceptable frame rates (25 FPS or so). Try to play on a server with 24 players, though, and the CPU just couldn't cut it, and the frame rate would tank to unplayable levels.
So if you're right around minimum specs, I'd say give it a try, just don't join 24 or 32 player servers (let alone the 64-player ones - although those lag no matter how powerful a PC you have since the servers can't really handle them). If you're much below the minimum, especially on the CPU front, it is probably best to save it for the future.
