This screen protector for the Canon 550D is perfect, fits perfectly. I noticed that it seems to be anti smear. Very good product, a mus. Gonna get one for my 5DMkII...
UPDATE....
I fitted two of these, one on my 550D and one on my 5D MkII. Yesterday, I had both camera's with me, shooting between them, when to my horror I picked the 550 up and there was a crack across the top left of the screen, my little heart sank for a minute....then relief washed across me when it dawned on me that I had the screen protector....phew..
As for removing it, yes it is on firmly, but it's probably meant to be (what else...Doh.), so one corner was lifted slightly with my finger nail, then some thick card was prised under and the rest of the screen lifted off pretty easily, to my surprise.
There was some glue remnants, but only round the edge. This was cleaned real easy by some (glasses) lens spray that I had.
All in all the screen protector saved the day, and what would have been an expensive repair.
Of course I now have another on order....