If you want to stay in Boston...stay here!! Don't scroll down! Kaitlyn's place is ideally located to explore downtown Boston. The location:
1. Is a 3-minute walk to Boston Commons
2. Is an 8-minute walk to the Red Line (MGH station)
3. Is a 10-minute walk to the Green Line (Boylston + Arlington both; bonus points is that it's through the Commons!)
4. is a 15-minute walk to Park Station (start of the Freedom Trail)
5. is a 15-minute walk to Whole Foods
Check-in was easy (same with checkout), the place was spotless, the beds were soft, the provided white noise machines kept the "city sounds" out overnight. Just amazing!
The only downside, and something to keep in mind, is that the only bathroom is downstairs (tight stairwell). If you have older folks, or kids, staying in the other bedroom it could be tricky overnight. For us though, this was not an issue.
I highly recommend staying here. When we come back (and we will) we will look for Kaitlyn's place once more!