i have the screen protector for my new mbp and my old macbook. I never leave home without it.
I also had a sleez for my macbook but didn't use it too much. I thought it was inconvenient to put on, so i used an incase sleeve. My girlfriend used the radtech sleez for her mb all the time and its great. No scratches or anything. But it does stretches over time and its a little loose after 1 year of use. It still fits and fits tight just not as tight as it was when we bought it first.
not hard just annoying. it doesn't have rings or anything so you just have to pull the corners. i thought the incase sleeve was just better.
i ordered the sleevz and the screensavrz for my mbp. I cant wait to try them out and se how good they are and if i can use the sleevz and then put it in the incase sleeve for travel.