This place is fine. It is very small, as shown in the pictures, so I would not recommend it for more than one person. It has lots of natural light from the two large windows shown in the photos. However, because the unit is at street level, if you want any natural light, you will have to sacrifice privacy as people can easily see directly in. The host could fix this by providing blinds that go up from the bottom of the window instead of down from the top (an easy fix). The windows are also nailed shut - presumably for security purposes - but this means that you cannot get any natural air into the unit. The unit is right next to the front door of the building, so you will hear people entering and exiting. The kitchenware provided is very basic: only two of everything, and only one very dull cutting knife. The shower is very tight, I had to turn off the water to soap up. My biggest complaint is that this unit is managed by a company that does not seem well organized. When I arrived, I had been given the wrong code to open the unit. Luckily the maintenance man was onsite and was able to give me the correct code. Also, at 9pm one night there was a leak from the apartment above which set off the fire alarm (which is right next to door to the unit). I tried calling the number provided via AirBnB and was sent to voicemail - no response no matter what option I tried. Luckily the neighbor upstairs had a different number and was able to reach an off-hours maintenance man.
Pros are that the location is really excellent (beautiful neighborhood, right in downtown Boston with a grocery store and public transport only a 5 minute walk away. Overall, it is not an unpleasant place, but I think I would not choose to stay here again.