I just put a shield on my unibody macbook, and so far it's ok. I took a few hours to put it on, but i spent so much time taking it off and putting it back down that I stretched it out and so it has a few over hanging lips and still has bubbles. I might take it off eventually and try again after reading all the tips, but I had to try it after the scratch I got on the bottom. 🙁 I did cry a little inside when I saw it. I agree that I like the aluminum feel and look much much better, but I hate scratches more, and as a college student, they are bound to happen.