I think most of the inverts are over rated.
Both sides of DD were okay in my opinion, the helix after the Immelman on Fire was the best part, but otherwise I wasn't too thrilled.
The only thing I liked about Alpengeist was the drop and the first immelman.
I just don't like Raptor, and I personally think it's the most overrated invert out there.
My favorite invert is still and probably will always be Batman: The Ride at SFGAm. Everythings intense, fast, and it's the one thing all the others lack IMO.