I only played the demo for a little while and I wasn't massivly impressed, although I will probably give it another try. I agree with the posts above that don't like the way it 'feels', its to loose feeling for me, it doesn't really feel solid.
It feels like Battlefield 2 but with Quakeworld style control and gameplay (don't know why I wasn't expecting that given the title) and I haven't played such fast fps games since the original QW and Q3. It's always hard to like something when it feels different to the last similar game you spent years playing (bf2).