Been playing this myself and I have to say I am enjoying it. The time based powers are pretty neat and the combat is fun. There is absolutely no question that it borrows MANY elements from other games, most notably Bioshock and Half Life. I don't consider that necessarily a bad thing, however, especially if the game is fun.
On the other hand, I am enjoying Alpha Protocol and most people are shitting all over that too, so maybe its just me. *shrug*
"Everybody out of the universe!" - Nibbler, Futurama