I stayed about 3 weeks in the apartment and my feelings are mixed. On one hand the location is in downtown and very walkable, on the other hand, there is a huge difference between genetic downtown busy-noisy and being on the same street as a very loud nightclub. Unfortunately the club not far from the apartment stays open late Thursday to Sunday, and the noise level on these days made it hard to sleep even with earplugs and white noise machines (which the host kindly provided).
Other than that, the place was spacious and as described. The bed was comfortable and the shower hot. The wifi was in general also good. Communications from the host was also timely. So if you have no trouble sleeping with the noise then this is a great choice for exploring Boston.