I stayed for 6 nights and had a very good time. The bed was very comfortable, the flat was quiet.
Everything is made to make it easy for you: check in, coffee, breakfast, a cupboard full of stuff you might have forgotten to bring with you.
Jessica checked in with me to make sure that I had everything I needed and respected my privacy otherwise.
The location is good, buses, muni and Bart all around, it was very easy for me to both attend the conference in Soma I was attending and play the tourist the rest of the time.
I definitely recommend staying here!