[quote name='mikelolol']This is a really good deal...I'm too keen for Dead Island though, and I doubt they'd get you it on release.[/QUOTE]
I got Assassins' Creed 2 through a previous version of the same promotion - a bit of a no brainer for me, as I read Empire every month anyway - the take up was a lot bigger than they anticipated, and in the end it took about 3 months before I got the game, so if you're desperate to play on release day then this may not be for you, but if you are in no hurry and fancy getting one of these games for £0.00 then it's well worth doing.
Personally, I'm probably not going to go for either of these, because I expect they'll do the same offer for Assassins' Creed : Revelations when that comes out in a few months time.
And I didn't have any issues with attempted auto-renewing, but it's always sensible to look out for these things.