Quote Originally Posted by dextercorvia View Post
It is a swift action, so that rules out using quickened spells, etc.
True. But at medium levels, you won't be using a lot of quickened spells, even the ones that cast as swift actions, since there aren't too many vital ones. You'll have to choose between at higher levels, but the Temp HP last more than a single round, so you can get away with it more often than not.