Got this game a couple of weeks ago and I'm still addicted to it. Apart from those Blazing Angels games PS3 has never had any air combat games put out until HAWX came along. When I was younger I was really hooked into those F117A simulation games on PC and this one has the same-ish feel.
There are about 18 maps or scenarios to complete, when you go up in Ranks (40 in total) you get more options with different planes and different weapon packs. So even you have completed the whole game once there are options of playing through again with different planes.
The multiplayer options seems great too. Options of Co-op play with 3 other players from around the world or fight against them in dog fights.
The only thing which is left out for me is the take off and landing parts. Every scenario you start by being in the air already. For the arcade people that's probably fine as you are in the air and concentrating on fighting straight the way. But for the real aviation loving people the thought of having to take the plane from the air strip and having to land your plane after finishing your mission would satisfy us even more.
Still though, it was $100 worth spending in my opinion.