I bought this with the Orange Box ages ago but have only logged a couple of hours. It's hard for NOOBS like me (even relatively experienced FPS players) to get into because everyone else appears to have unlocked extra weapons and items as well as having had hundreds of hours to get to know the maps.
What I did find however was that the community were
staggeringly helpful and kind over my NOOBishness, but it's still hard to feel at ease when you're getting panned.
And as it happens, I spent most of my time as a Medic, and did pretty well I thought