Great place - location is terrific - within walking distance of Newbury St and Coply Square, for shopping and dining. On the 5th floor, with terrific view of Charles River and MIT.
Michelle was very responsive to texts, but truthfully, everything was taken care of and her explanations about check in and check out were excellent, so I didn't ask her much for anything.
One potential thing to be aware of - the street fronting the apartment was busy all night, so there was always a low droning sound through the night - it didn't bother me, but if you're sensitive to sound, consider bringing earplugs.