Carl's place is located in one of the nicest San Francisco neighborhoods. He even provided me with secure garage parking for my vehicle. The room was comfortable and access to the private living space was convenient, with lots of very nice amenities. When you stay at this location, be sure to venture out for a stroll. You are just a couple of blocks from Alamo Square and you are even on the same street as the famed "Painted Ladies", the beautiful row of colorfully painted historical Victorian Mansions that are among the most photographed sites in San Francisco!
One thing I would point out to future guests...
If the hot tub in the back yard is a feature that you are anxious to use, please inquire further for detailed instructions before you arrive, as I found it to be inaccessible.
This location will require you to climb multiple sets of stairs and not every guest will be able to gain access to the hot tub. Despite my frustration related to the hot tub, I would definitely return on a future visit to San Francisco.