Sorry this is a little late answering your question, but we never have a problem with the Pop buses. They run frequently. Sure, if you just missed one you might have to stand and wait for a bit, but nothing super inconvenient. We are usually in a preferred room and are near transportation. We even used a bus very early one morning to take a tour at MK. That was so cool. When we boarded the bus, it was still dark out. We were the only ones on and I thought we would have to sit and wait for others, but we were whisked away immediately. It is true that Pop will probably be the farthest stop when you leave the parks. Once when we were deposited at HS, the driver announced that when we left the park, our stop would be #1. Everyone let out a cheer. They didn’t realize that would mean, number one aka the first and farthest. IMO, Disney does an amazing job moving the masses. Even during Spring Break as HS let out at closing, there were buses (even backup/DME types) lined up and ready to accommodate the crowds. We love Pop, it is our favorite!!