I've played it too. It's really good but since it's a Beta it does have it's share of problems. It seems to have alot more assholes playing it though. Worse than normal. Every single childish noob has gotten their hands on it and you've got people wallhacking and spraying pictures with nasty porn stuff (once I think I saw a scene from a snuff film :w: it was quite pixilated, but I could swear...) Also, even if you have a good conection you will always have lag. The servers aren't sturdy enough yet or something to that effect. Oh well. It's a Beta.
Once they get it all fixed up and everything it should be quite good and hopefully most of the youngins that do the stupid crap will be gone because they won't have the dough to buy HL2.