Uncommonly Great
We were looking for a convenient spot to stay close to Fenway Park, as we were seeing a Red Sox game. We were also doing some touristing over the Memorial Day weekend, so wanted relative location convenience to the other parts of the city. The hotel Commonwealth did not disappoint, and while I would not call it inexpensive, the value is very good. The location is very convenient to a number of walking distance attractions such as Newbury Street, The Fens and the Gardner museum, and with the Kenmore T stop literally out front, convenient to other parts of the city. 
The service was attentive and friendly without being obsequious from the first contact at Valet Parking (a bit on the pricey side, but it is Boston, land of no parking) and the doormen, through every other contact - bellman, front desk, and housekeeping staff. Warm and friendly folks who engage in just the right amount of familiar small talk without going over the top.
The room was immaculate and very large; two queen beds, two large, comfortable chairs, a desk and plenty of room to spread out. Our room faced the back of Fenway Park and that was quite a hoot. The beds were extremely comfortable, pillows a little too puffy for my taste, but a good firm mattress that made for a good night's sleep. Given the busy location and the fact that hotel appeared to be full, it was also remarkably quiet, even give the fact that were too close to he elevator for my preference. 
The only very small quibble I have is that we did not have an in-room coffee service. Another guest on our floor commented on theirs, so I was left wondering at what level does one receive a coffee service? Never the less, the experience was great all around. I would definitely stay at the Hotel Commonwealth again. A great spot, highly recommended.