Hard to sleep
Even on the uppermost floor without the footsteps from above, it was still difficult to get away from noisy neighbors. Even at 12am, we heard the neighbors' loud footsteps down the hallway, their conversations and the slamming of doors. To top it off, the beds were very uncomfortable. I usually don't mind firm mattresses, but this one felt like I was sleeping on a lumpy bed of dried-up clay. I barely slept during our (fortunately only) 2-night stay.
Add to that a broken cabinet door, a fridge that emitted an awful smell when opened, and an elevator that would stall constantly between floors 8 and 9 for about a minute, I'd say the Holiday Inn has a lot of work to do. 
As for pros, the location is about a 10-min. walk from the harbor (but only 2 blocks from Camden Yards). Also, the fitness center and pool area were well-equipped and clean. Liked that there was free wi-fi available.