I had an extended (~3 week) stay at Simon's pace due to work in downtown Boston. The commute to Government Center was unbelievably easy as Simon's place is just a 8 minute walk to the Maverick T Station. For those that don't know, this is 3 stops from Government Center.
The place itself was everything I was looking for; private entrance, private bathroom, and clean. The place was spotless and included terrific Wifi, a huge 55" smart TV, a large comfortable queen bed, and a Keurig with what appeared to be limitless k-cups!
Also, I literally walked to the Airport Shuttle (at the Car Return Location) at the end of my stay, which was about a 10 minute walk. So easy!
Needless to say, I am returning to Boston shortly and will be staying here again.