The B&B is in a quiet residential area. We got a bit lost trying to find it as we got out from the wrong exit but overall the location is nice. It's about 8 min walk from Minowa station which is 2 stations away from Ueno. The room is clean and tidy. Though it's not very big, we felt comfortable.
Min is a great host. He responded very quickly to my messages. He let us store our luggage in his office for the two days we were away from Tokyo and put it in our room when we came back. He is also really friendly and funny. Would like to stay in this B&B when I visit Tokyo again :)