I've had it on for about 5 days and I have not noticed any heat issues. It was very easy to put on, the back probably took me less than a minute to put on, the sides took a little longer.
StickerBoy, right? You Pro users are lucky that your case is the same between gen 1 and gen 2. I can't use a Surface RT skin on my S2, boo.
But are you planning to skin the S2? I really like the silver look and pray that it does not get scratched. My RT - though smudged with fingerprints - remains in flawless condition!