we spent 3 nights at the Marriott at Key Center.The staff were incredibly helpful and efficient. They even noticed our tire was a little flat and brought someone in to fix it. free of charge!!. The room was well lit, very clean and comfortable.The workout area was large and the pool was small. Altough it is a little tricky to find the hotel as the even though the address is public square it was on the boundaries of St. Clair and Ontario and Mall drive. We were a 10 minute walk from the RRHOF and the warehouse district and tower city. I would highly recommend this hotel.