Excellent Stay
My family stayed here for two nights in May using Hilton points. Our room was upgraded to a stadium-view room without asking. We had access to the Executive Floor lounge that served a complimentary continental breakfast and evening snacks and drinks. High speed internet access was free for Hilton gold members and above. Everyone on staff that we had contact with went out of their way to be helpful and friendly - truly - better than average!
Our room was clean and the view inside Orioles stadium - a stone's throw away - and the Baltimore skyline was amazing! Room furnishings were pretty standard for a Hilton. Mattress was comfortable. 
We had lunch and dinner at the hotel restaurant and it was very good. Parking is expensive - be prepared, and you really have no other option. This is not the closest hotel to the Inner Harbor and all its attractions, although you can walk there from the hotel, but it is right next door to the stadium and convention center. It is also a few blocks to the medical center and teaching facilities there. 
I was impressed!