I had one on my unibody Macbook and they are great. I also have one on my iPhone and had one on my iPad. They are the best. Best customer service too.
I ordered the one for my Macbook and it didnt come with a squeegee, so I emailed them about it and they sent me a brand new one, didnt even have to give back the one I had. So i essentially had 2. Also, I got my iPhone shield put on at the stand in the mall. Like two weeks later one side got warped somehow and a bubble got in. Went to the mall, replaced it right there and then, no questions asked.
They really do have the best warranty and service and I back them 100%. I would let them install it for you at a kiosk if possible. Its worth the install fee, because if they mess up, they can apply new pieces. If you screw up a piece, your stuck with it. And some of the laptop pieces can be tricky to align just perfectly.
Make sure you get it really wet before you try to get it on