I like both AVP and AVP2, but I didn't like this much.
May be it's just me but single-player campaign was a lackluster for me. Especially alien campaign: very short, small maps, it's as if they just thrown you into multiplayer maps and placed targets here and there. I remember playing first AVP (in fact I have it's updated steam version installed recently), you had to plan ahead, observe the situation, find ins and outs before rushing in and killing everyone. Here it has nothing of that. Beginning was fun a little but it got uninteresting very very quick.
Plus like it has been said before - alien is slow. And I'm no fan of those "killing moves" either. Overall the game has been a disappointment for me. I had hoped for AVP1 made with better graphics while keeping on the same ideas and possibly containing new features. Not here. Except for graphics, which is nothing spectacular either. Technically it's fine but level design is lacking and poorly used it, oh well - don't get me started on that.
