Didn't buy it. Maybe it's just me but I'd like them to try something new with counterstrike. CS:GO seems like another stopgap measure to unify the playerbase again and I'd love it if Valve gave up on that and develop new maps (maybe even leave out dust) and change the formula.
If this is your first CS then it's probably the best version, but you are going to get so worked over by the veterans. They are animals.
I just don't see the point of that. Make a new game. Counter-Strike is what it is, it's much like DOTA but with more maps. If you change the game; change the name. Also there isn't that many games like it, it has it's own place in the market. I think it's admirable that they didn't put ADS and a perk system in the game, that's what many other developers would have done.
I have really enjoyed the game, but I also feel like I'm a part of the target demographic. I played a lot of 1.6 eight years ago and didn't like CS:S. It feels great to jump back in now to a new game that still can offer those CS moments that I haven't experienced in any other game. I wonder how many people like me there is through.