Great location, some improvements needed
As we consistently experience, the CopleyPlace Marriott is staffed with friendly and helpful folks, the rooms ate clean and nicely updated, and the location is well chosen. That being said, we experienced some oddities in our room. 
We arrived early and were offered the option of either a two double bedded room or a king sized bed room which was "accessible" (meaning she said a walk in shower) both of which were immediately available. We chose the king room. It was nicely sized and had great views, although much to our surprise, no walk in shower unless you count a low bathtub. There were lots of grab bars in the shower. 
The closet was small, and half was taken up with a shelf that ran from the right edge to the middle of the closet just below shoulder height. This limited the amount of hanging space. I always unpack so things became crowded quickly. 
The bathroom had no "makeup" mirror, something I am used to seeing standard in any good hotel. No shower cap was provided. I am sure I could have gotten on if I requested, but since I didn't notice the lack until I was just about to shower I made do. 
The most important issue was that the bathroom floors were like black ice once a drop of water hit them. It is a large bathroom, inevitably either my husband or I would drip after our shower...after several harrowing slides across the floor we took to covering the floor with towels as bath mats to avoid the excitement. 
We were in 2227. I don't know if this surface was standard or designed to make if easier for wheelchairs. We speculated that perhaps it was designed to put guests into a wheelchair. 
Our son had stayed here and not had similar problems (although he felt the room he had was tine and without a view, we had a marvelous view and a nice sized room). I love the location, easy access to the T and walking distance from many great restaurants, shopping, and historic spots. Ambivalent about whether I would stay again due to the issues mentioned.