It's very easy to go to Liz' apartment coming from Boston as it's just a 2 min drive from the highway 95. If you want to explore Providence and go to nice restaurants in downtown (I recommend Atwells Ave), it takes 10-15 min by car.
As Liz was herself travelling, we did not meet her personally but she was available and very reactive and friendly by email.
The apartment is as described with lot's of plants, a piano, a comfortable couch, a bedroom with air-conditioning (the mattress is very soft tough) and another small room (which might be useful when traveling with a child). It was a bit difficult to get fresh air into the rest of the apartment, however the air-conditioning in the bedroom worked well.