I am a fan of MCACC, but only because I have a Pioneer Elite receiver. Does it work and work well? Absolutely. Is it better that Audyssey, I have no idea. Keep in mind that the algorithm in any of these programs are set to try to get certain, predetermined responses and tweak until they get as close as possible. Maybe that isn't what you, personally, like to hear, so you tweak and adjust it yourself. Nothing wrong with that... After all, it is your setup, right?! One thing that I have learned, though, is that there is no substitute for actually fixing the acoustical problem with a room. I've been to SirQuack's place. It sounds light years above my theater mainly, in my opinion, due to bass traps, first reflection panels, and a good ol' SPL meter.
