I was very much looking forward to this shooter and I was following it closely, I don't normally write reviews on products like this but this game is so utterly poor and very typical of the way the Games Industry is run now.
The game on release was filled with bugs, balance issues and simple problems that could have easily been fixed if the coders of the game had taken the time to spend about a week or two fixing them. As mentioned in other reviews you have the very obvious problem of the developers deciding that an instant kill button was appropriate for multiplayer gaming. Adding to that they have made horrible balance changes each time they bothered to patch the game particularly in regards to the predator race which everyone in the game plays because you automatically win.
When it comes to the basic interface options and lobbying this game fails dramatically in every aspect. Until recently there was no support for dropping into games that were in progress, you would actually have to sit and wait for players to show up before playing. I don't know what the developers were thinking when they decided to make it so that no one can change races when actually inside the game so that the teams would stay equal in numbers if people left.
I could go on and on listing everything wrong with this game but honestly, I'll save you all the time, there is a very good reason this game is priced at 4.99 and it isn't because it is a bargain.
It is absolutely sickening and baffling that games companies with billions of funding behind them cannot hire at least reasonably competent and dilligent programmers or QA staff or at least train some so that they won't be beaten by one man coding a game in his free time while at a regular job. This is exactly what is happening, I am of course referring to the man behind Minecraft, World of Goo a puzzle game was developed by two people and both are equally superior in their own right merely as products nevermind what genre they are when compared to this game.
Go and spend your money elsewhere maybe you should buy a classic game if you want to buy a game with that kind of money.
I recommend Deus Ex, it is far superior to Aliens vs Predator and about two pounds cheaper.