The Copley Place Courtyard is ideally located, and not too big. Although all Boston hotels are pricey, this one is more reasonable.
The best thing I found was the superb staff, including Front Desk, Valet/Bellman, and Housekeeping. Every one of them went out of their way to make me feel welcomed and they kept doing it the whole three days I stayed.

I spent one week in Boston with my wife and stayed at this Courtyard hotel. The hotel is in a good location in Back Bay, close to the subway station and many local attractions. Staff is very kind, always ready to help and give a free bottle of water if needed. The hotel rooms, however, are just standard. Bed is nothing special, pillows too soft, furniture shows wear and tear, lighting is quite dim. Bathroom just as well was dimly lit, with toiletries that were plenty but basic. Towels were plenty as well but a little rough. We did not try their breakfast. TV in room was with poor picture quality and exorbitant prices for movie rental, without any option for Netflix or other on demand apps.
It would all make it for a good experience, if it wasn't for the fact that the room cost, on average, $500.00 a night, which is pretty standard in Boston but still quite high by any other standard.