It was great to stay at Bay Village suit. It’s located in the beautiful neighborhood of Back Bay. Several shops nearby. Close to multiple (Green and Orange lines) transit locations. The neighborhood is quite safe.
The room is private, but the bathroom/kitchen is shared. The bathroom is cleaned daily, I think and it was mostly clean during my two months stay. Since it is close to the highway, expect to hear highway noise. It was not a problem for me. They also provide a device that generates white noise and it may help you to get rid of outside noise.
The host is very responsive and tries to help and resolve if you face any problem or even need some recommendations.
One important thing to notice is that you cannot receive some specific UPS mails (such as Debit/Credit Card/SSN) to the building. You will have to open a local PO Box. Other deliveries, such as Amazon, etc. work totally fine.
In short, it was wonderful to stay in the best neighborhood of Boston at Bay Village Suite.