So boring...
When you try the demo, you fall in a never ending repetitive gameplay. Kill, drain, kill, drain, again and again.
When you try the full game, OMG !!!! What a big change !!! You kill, drain, kill, drain...
This game could have been a great thing but in fact it's just a boring game with a nice look. In the other way we got Lost planet who is really impressive and really fun, even if the gameplay isn't original. So I suggest you to keep your money for the incoming Capcom game :)