My wife & I had a great stay in Potrero at Emily's modern and immaculate home. Because we had plans outside of Potrero we didn't get a chance to explore much of this quiet, safe,and attractive neighborhood, but we can say that on-street parking really is available at no cost, with no residential sticker required, and with no time restrictions other than a clearly-marked street sweeping time window once per week.
Our room was scrupulously clean and comfortable, as were the common areas. The open kitchen was a pleasure to use for breakfast and coffee making. As other reviews mentioned, the north-facing view from the living area of downtown and the Bay Bridge was stunning.
Although we're more accustomed to a solitary and anonymous experience at a hotel, we really enjoyed chatting with our host and the other guests. We wondered how we'd like sharing a bath with one other occupied room, but it was no problem at all. Don't hesitate to makes a reservation with Emily!