I didn't vote, because my "option" wasn't up there. I would never say that YPAO calibrates better than a pro, but YPAO is a big help for a newbie, something you describe yourself as.
As a newbie myself, I found YPAO invaluable . . . as a starting point. Once you understand how to set things up yourself, you don't really need YPAO. And YPAO does make mistakes. I've had to correct its mistakes (setting a speaker to large when it should be small, for example) more than a few times. But it is helpful in telling you when speakers are wired correctly. I remember being mildly worried about that when I set everything up for the first time. Personally, I like to run YPAO, then do further level-matching refinement afterward.
My advice is that if you're a newb, get something with YPAO. It'll eliminate a lot of confusion when you're setting up. But once you're a little more experienced -- and can get your hands on an SPL meter -- you won't need it.
cheers,
supervij