I'm having the same experience. I got a 2011 Air (my first Mac) and Lion seems pretty decent. Scrolling feels natural, and everything seems to work as it should.
My only complaints are the keyboard (as a programmer I really miss home/end/page up/page down), and that I can't reopen closed tabs in Safari.
My only complaints are the keyboard (as a programmer I really miss home/end/page up/page down), and that I can't reopen closed tabs in Safari.