PA versus MD, who'd you rather?

My granddaughter has been to the “doctor” only a few times. Everytime we go, we see the Physicians Assistant instead of the Physician. I have not had a problem with that, the woman seems knowlegable. The good thing about seeing her is we always get in on time and it is an easy appt. to get.
I was wondering what your thoughts were? Should I be holding out for the “real” doctor?