Beautiful Boston Hotel
My husband and I stayed here last night for a Valentine's Day getaway, and we could not have been more pleased. We booked the King Junior Suite and it was very spacious and clean. The bathroom was smaller than expected, but the room as a whole was beautiful. Firm but comfortable beds, complimentary bottles of water and free WiFi were nice touches. Since we only stayed one night, we didn't use any of the amenities, but check in was easy and the staff very friendly. The lobby was very welcoming with a fire going in the fireplace. 
Here's a tip for parking: If you don't want to pay the steep $42 per night to park at the hotel, you can get coupons to local garages at http://boston.centralparking.com. Just click on "neighborhoods" then select Back Bay and a selection of garages will come up where you can get coupons for discounted prices. We parked at the Prudential Center garage which is literally right next door for $27 overnight (without the coupon, it's $39). 
All in all, I would highly recommend the Lenox Hotel for a great stay in a convenient location.