The demo is very good, the default controlsare good, but a little simple, most likely to help new players. After customising the controls to beter suit a g15 and g5 setup I fell in love.
I love FPS games that test reflexes, tactis and strategy without too much camping or just nade spamming (looking at you COD series). AvP ticks this box.
The combat is fast and furious and depending on race plays very differently. Adding a lot of variety!
As a Marine you start with the motion sensor and pulse rifle, this being your racial advantage, high ammo and clip size and death from range plus an indication of any movement (but not which angle it's coming from). You suck at melee but you can't have it all.
As a Xenomorph (Alien to non-fans) you have no ranged attack only melee but have speed, agility and close combat as your racial advantage. You fail at using stealth and sped and the Marine will destroy you, get up cose and you will tear them apart.
As The Predator, you are a fairly fast, fairly good at close combat, with powerful weaponry you must find, but it is slow firing but very powerful.