I have played a few games on PS3 now and have got a good feel of all the species, i have to say my favourite is the alien, sneaking on an unsuspecting Marine from above for a stealth kill i always satisfying, i agree if you suffer from vertigo not the class for you as it can be hard to navigate certain parts, The Marine is deadly for 180 degrees, but it very susceptible from a swift attack from behind and they have the lowest health by far, and the Predator is like the Panzer Tank of the game, slow yet extremely powerful, the vision modes are both a gift and a curse of not being able to see the other species if your in the views, but i will agree that Disk is far to powerful more powerful than the shoulder cannon and that's stupid