I stayed here about 2 months ago for 1 night and I really enjoyed my stay.
This was my first time staying at a B&B and I chose it mostly for the price, and I was not disappointed. The couple that run it were very nice and hospitable. It's in a quiet neighborhood, about 5 min walk to the light rail station, and about 20 min walk to Penn Station.
My room was nice, and the AC worked (it was pretty humid by my So Cal standards), and even though I booked a "shared bathroom" room, I did get my own, which was nice.
Breakfast in the morning was great, as was the company, which included a couple other guests, and the owner.
If I'm ever in Baltimore again I would happily stay again.