As others have said, the location is excellent. The Cobblestone Pub is not to be missed -- low-key, authentic traditional music. Two grocery stores nearby are handy.
The apartment is spare, just the basics, but nice and quiet (neighbor-wise). There is some noise from the courtyard.
It's impossible to find. I didn't realize Smithfield is an area, while Smithfield Market is the name of the square/housing complex where you find these apartment buildings, each of which is marked with a letter. The letters are small and hard to see. There seemed no way to find "C" in the blank grey towers. A helpful clerk from Chopped led me confidently to a building saying she used to live in block C -- it turned out to be Block A. All this time I was communicating with Michael via the Airbnb website -- a cumbersome method if your phone is connecting slowly. I was so confused I had a complete stress meltdown by the time I found the place. Michael was brusque, even when I started to cry, and shouted at me that he'd appreciate some compassion for severe stress he was in. I felt this was unfair since I had no way of knowing he was under stress.
It was a combination of factors that led to this unfortunate beginning but I'd say don't rent this place if you have trouble with maps, directions, and logistics. It's just too confusing. The bathroom had scanty supplies: the hand soap was nearly gone and there were two partially used rolls of toilet paper. No backups for either soap or toilet paper. Little things like that can make guests feel comfortable and safe. Michael did supply a hair dryer after I couldn't find one in the apartment.
As others have noted, he's well informed and helpful about the city.