I have gone 5 times in the past 20 years or so, and I would say that the bus service is getting somewhat worse over the years. The worst was my 2019 trip, but that might have been a function of the resort we were at, CBR. It was a resort with multiple internal stops, and we were one of the last stops so very frequently full busses would just pass by our stop. Plus the skyliner had just opened so we would see multitudes of Epcot and HS with no one in them since they hadn't figured out the balance. I wanted to yell, "Just change to an MK bus, damn it!". One morning we waited nearly an hour for a bus to MK. When I stayed at OKW in 2016, which also had lots of internal stops, I had no problems at all, and I was pleasantly surprised because I had heard a lot of complaints about the busses. The best overall bus experiences I have had were at resorts with only one bus station and a preferred room. I am specifically thinking of AOA. I never waited more than 10 minutes for a bus that whole trip.