I thought the buses were very bad when I stayed there.
My room was in the very back corner of mansion Parterre Place, so I used the main bus stop, which seemed the closest. It was the same thing EVERY morning - people waiting for MK buses were waiting all over with poorly formed lines (or just no lines). So when the MK bus came, it usually was almost full from POFQ, and people would cram onto standing-room only. It got sooo frustrating, trying to fight the lines just to get smushed like sardines on the bus! The other park buses didn't seem to have the problem, just the MK one. And even if the MK bus was filled with us at the main stop, it had to STILL go around the loop, pass the other bus stops, before leaving for MK. It was a slow process, for sure! I got so fed up that I drove to MK by the end of the week, which I hate doing (park, take the tram, then monorail), but still probably was faster.
I remember it would usually take an hour and 15 minutes from when I arrived at the POR bus stop, to when I got off at the MK one. Too long. Yes, I could have woke up sooner to beat the crowds, but still, it seemed the buses could have been run better to handle the crowds.
I won't stay at POR anytime soon, and the buses are one reason.