I didn't use the service, but I did encounter one of the buses (#3998) in Baltimore. The driver rode right up on the back of my SUV, and when I slowed down, he passed then intentionally cut me off. I know this because he cut back oveer after he had only passed me about 1/2 the length of the bus, then went back to his lane after I had to bail into the shoulder. Afterwards, when I pulled up along side him to copy the bus information on the side of the bus, he gave me the finger. I'm glad I'm not a passenger or using this service. The drivers are dangerous and have no respect for others on the highway.