Our tour guide was Vince. He was horrible!! I could not understand everything he said. He was trying to make jokes the whole tour. This was not the time to try your stand up routine. My group did not even believe everything he said. Also, he sat slouched in the first seat while he spoke. Very unprofessional. I also thought he should have been dressed in the red polo shirt and khaki pants some other workers wore. We were very disappointed and could not wait to get off the trolly.