Adequate, but not as special as I had hoped
I stayed at the Beacon Hill Hotel and Bistro for one night recently through a Jetsetter deal. I got a good value--$195/night including breakfast. This appears to have been about $90 off the regular rate for a Queen room. Jetsetter hotel deals are usually at really great, special places, so my hopes were high. But I found the hotel to be pretty average.
First of all, you're really on your own. No valet (and parking is a nightmare--and expensive at nearly $30 for 24 hours--in the public lot at the Boston Common, which is where the hotel recommends you park), no bellman, no turndown service. They are friendly and hand you a key and that's about it. 
My room was small-ish but a perfectly comfortable size for a solo traveler, and very clean. The bed was rather uncomfortable, with cheap sheets and really terrible pillows. The bathroom was small, but again, fine for one person. Everything in the bathroom was very clean but for the bathroom floor, which seemed a little dingy. Towels and toiletries were quite nice. 
There was quite a bit of noise early in the morning with the garbage pickup on the street. This is par for the course in a city and there's nothing the hotel could really do about it, but if you are sensitive to noise you might want to ask if there is a quieter part of the hotel. 
Complimentary breakfast in the hotel's bistro was good, but not exceptional. The nice part of that complimentary breakfast is that you can order anything on the menu--you're not restricted to certain items as you are at many hotels where breakfast is included with your room rate.
Overall, there is really nothing wrong with this hotel and if you get a good rate ($200 or under), you certainly can't beat the location. But I felt underwhelmed by my experience there, and would have been quite disappointed if I'd paid nearly $300 for the room.