Just got it and its pretty much 'a perfect circle' with Billie Howerdel singing. He actually wrote all the material for A Perfect Circle and Maynard just sang. Maynards son does play cello on the cd. really well written, takes you along for the ride with the entire disc.
Hmm. I've only heard "The Stone". I liked it and have considered picking up the full album... just haven't gotten around to it. After all, if it's anything like APC as you say, I'll most likely enjoy it.