We really enjoyed our stay here, with a few minor exceptions.
The location is fantastic, just one block away from Boston Commons/Garden (which is where the Freedom Trail starts) and a short walk from shopping on either Washington Street or Newbury Street. It's also just a few blocks from Chinatown.
The space was clean but a little bare. Seating for two is available on a loveseat in front of the TV (which has plenty of channels to offer). There's also a small hightop table with two chairs.
There's a full kitchen, but I'm not sure what the rules are for cooking. No water bottles in the fridge, but the tap is drinkable.
The bathroom/shower are great, with some shampoo/soap amenities for showering.
Our major issues were with the bed and the heating/cooling. The bed feels a bit cheap and was rather stiff. Meanwhile, the heat was apparently blasted all throughout the building (despite a lovely fall day in the high 60s) and we couldn't get the AC to come on in our unit. We just turned the fans on high and opened the windows.
In regards to the street noise that other people have mentioned, it wasn't a big deal for us. I think if you're used to city life (or have earlplugs) you'll be just fine. The parking garage across the street beeps every time a vehicle exits but the activity declines sharply after 10:30 pm.
Overall, we enjoyed our stay and KJ was a great host.