We had a lovely time at John's guesthouse, staying in unit #4. It is cozy, spacious (we were three, but it easily fits four in our view) and spotlessly clean. Everything was as described in the listing. We didn't use the BBQ and the other amenities in the backyard but spent quite some time sitting on the front porch which is nice to have a beer and a bite on. If you sleep on the sofa bed in the room facing Market Street you are likely to hear some traffic, particularly if you keep the windows open to get some air in. We weren't too bothered by it but if you are very noise-sensitive or want to sleep through till noon every day it might be an issue. The bedroom is very quiet though. The house is located not far from the Gaslamp Quarter, about a five minute drive. All other things you probably want to see in San Diego are also a 10-20 minute car ride away. John is also a great and very responsive host. Check-in worked seamlessly, John did everything to make our stay pleasant (ask him about his suggestions about what to do in San Diego!). We can definitely recommend staying with him and would do so again next time we are in San Diego.