It's not cool. Oh, sure, it's easy to understand why you'd do it: you're old and rich and your body is falling apart, and suddenly you think, "Hey, maybe I need a new liver," and then it's a short trip to "Hey, if I clone myself, I'll have all the parts I need," and then you're half-way to thinking, "Maybe I'll just move my current brain into a new body!"
As The Island -- or, the cheap ‘70s movie that it completely ripped-off, Parts: The Clonus Horror -- reveals, clones aren't exactly happy when they discover they're nothing more than a walking container of extra parts. The Clonus Horror takes the steps of making the clones they raise stupid, but eventually one of them is going to escape the compound they've been kept in, figure out the elaborate story you've told them is a lie, and then freak out.
Just stick with buying organs one at a time, man.