Booked this adorable bungalow for my wife and myself for the month of February, to escape the cold and dark of NYC. It is, indeed, small (less than 550 square feet) -- but exactly as represented in the listing and, as importantly, amazingly well appointed. Everything one could want to relocate -- short-term or long-term -- is provided or, at minimum, you have a good "starter" kit (e.g., sponges, paper towels, soap, detergent, etc.).
Beth and Gail are also super-responsive -- we had two issues during our time -- each of which was taken care of promptly and well.
Coming from NYC, on-street parking was not an issue. With maybe a couple of exceptions, we could always park on the same block or just around the corner.
Also, Wi-Fi was fast and continuous, and the TV choices (Netflix, Amazon, HBO) a full roster and easy to use.
The room that feels the smallest is the bedroom -- you do have to squeeze past the foot of the bed a bit -- but it's really not a big deal (and might be ameliorated by a different door stop).
We had occasion to try both the heating and the cooling. They are central, easy to use, and very quick at doing what you want.
The washer/dryer unit located outside worked without a hitch. There is also a hose there if you need it to wash sand off of your feet (I hope you're going to the beach if you're coming to San Diego).
The backyard has an excellent propane Weber grill, kept in pristine condition, two lounge chairs, and a long picnic table with chairs, a bench and an umbrella. It's a perfect place to have morning coffee, evening wine, or simply move your laptop to in order to do some work (but you will need an extension cord). And it really helps with increasing the feel of the overall size of the unit.
Two potential issues that may be of concern to some. First, the bathroom -- which is gorgeous and well laid out, with shelves and hooks galore (and great towels) -- has a claw foot bathtub (shown in the listing pictures) into which you need to climb in order to shower. Honestly, it's not so easy (although certainly doable), so if you like showers and have any mobility issues, be forewarned.
Second, none of the windows have any screens in them. Turns out that, in February at least, San Diego is pretty much insect free, so this didn't matter to us. We could keep the windows and doors wide open, enjoy the breezes and not deal afterward with mosquitoes or other tiny critters. I can't speak to other seasons. In any event, if you're an A/C type, this will never be an issue.
In sum, we really enjoyed this house and can recommend it enthusiastically. It is without question the best-appointed Airbnb at which we have ever stayed. Except for its size (you really wouldn't want more than a couple staying here -- although we did host a son for a few days on the pull out), we wouldn't hesitate to re-rent it again for another San Diego escape.