My wife and I stayed at Erin and Howard's place in The Marina for 3 nights at the end of April and had an enjoyable time.
The room is located in a fantastic neighborhood of San Francisco, a stone's throw away from the water with scenic views of Alcatraz and the Golden Gate Bridge. It's also a few minute walk away from Chestnut Street, which has several restaurants and bars and is a popular area for younger adults at night. It was never more than a 15-20 minute ride to anywhere else in the city that we wanted to go. The neighborhood seemed very safe, which can be a concern when trying to find a place to stay in SF.
We had a car and there was free non-resident street parking in the neighborhood between 6pm-8am. It is also close to the marina parking lot which has free parking during the day. Erin and Howard also offered to let us park in their driveway, which was very generous.
We did not spend much time in the Airbnb as we were mostly on the go, but there was a nice living area with some comfortable couches and a table for eating breakfast. We also had access to laundry, which was a huge plus after a long trip.
The room had an ensuite bathroom with a very large shower.
The floor is listed under the Entire Home category, though it is not self contained from the rest of the house. We did not have a problem with this, though travelers looking for more privacy may.
Though we didn't interact much, Howard and Erin were very good hosts. It was easy to communicate with them via text/Airbnb Messaging and they gave us good tips on things to do in San Francisco.
All in all, a very good first stay in SF.