Having used Great Stuff many times in the past, it works just like you'd expect. When I first used the stuff, I thought it was one of those "shaving cream" type foams that expand instantly - so I thought the 'size' it came out of the can was the size it would cure at. Needless to say, I used way too much.  However, since this can is a single use product, there's no real point in trying to "save" any.  Nothing really new to say about Great Stuff, works as always!