As buggy as a rainforest!
I needed to resize manually iTunes, check the proxy, check everything before making it work.
Also: I needed it for a while, migrating from a PC to a Mac my whole library. I finally migrated it only on the Mac, and the license tooo, has changed once and solely.
This is not a nice way to make customers satisfied: libraries are often distributed over several own computers, and you must chose only one of them to make all the changes with this crap.
I also had a big problem: TuneUp changed, instead of AVOIDING like I ordered, the Across the Universe album from the Original Soundtrack CD, messing up titles and artists! I hated it!!! 32 track of the deluxe edition needs now to be re-managed!!!
What a crapware.