Charming, cozy and spotless studio apartment. The street is quiet and there is some on-street parking. Small kitchenette with mini fridge - separate freezer compartment is very nice, as I like to freeze a water bottle. Microwave, small sink. Fridge stocked with yogurts, water, OJ. There's instant ramen too. Handy supply of cutlery and dishware.
I believe the heat comes from a vent attached to the owner's apartment. There are pets, so if you have a pet allergy you might want to check that out if you need heat. I did not need heat - the weather was gorgeous (early May) - and I kept the vent closed; had no problems at all.
The immediate area is quiet, with a 3 minute walk uphill to a street with grocery stores, restaurants, cafes, laundromat, public library and several buses. A very pretty park in one direction, and a major hill (not really a park, just a view) in another. Can take the local buses to BART or Muni (streetcar, which I enjoyed alot).
If you're going to center city, be prepared to take some time on public transit, 45 min or so. This was a compromise that worked for me as I was there to visit my son who lives in Bernal Heights, as well as sightseeing. I also enjoyed the streetcar! You just need to plan your time accordingly. And drive or use car service if you're in a hurry. We did this a few times and it was quick and easy.
Marty is a very considerate host and I recommend this rental highly for 1-2 people - 5 stars!