Staying at Jason's place was great. He and his mother (who welcomed us) are very warm and friendly people. They provided us with everything we needed and gave us great tips about the restaurants in this area (and the mission is full of good restaurants). The room was clean and spacious and looked exactly like on the pictures. Because there are other rented rooms in this house getting into the single bathroom could be a little challenging.
The area is okay, but just a couple minutes away you find yourself in the vibrant mission street or the valencia street. The BART (with takes you directly to the airport) is 7 minutes away.