This was exactly what my boyfriend and I needed for our one night in Boston.
The apartment is tiny and minimalistic, but it has everything you need. The name says it all: definitely has a medieval feel with an entire exposed brick wall. The neighborhood is historic, lively, and full of great seafood and Italian food (it's in Little Italy, after all). Short walk to public transportation.
The host gave great directions (would be hard to find otherwise) and left plenty of tips to help us get around. I would definitely stay here again!