Stayed at the Hayes Valley in Sept 2012 and it was a great location for a budget stay in San Fran. The room was spacious and the bed was huge and comfy. The breakfast was the best we got in a 2 week stay in California with plenty fruit , cereal and breads on offer. It is also a great way to meet other travelers and share stories and info around the kitchen table.
The staff are helpful and friendly and the building feels safe and secure. There are some nice places to eat and drink within 10 min walk and a bus route to city center 5 min walk away. The only downside is a shared bathroom and shower but it was always clean and perfectly adequate. As we had a car parking might be an issue during the week but as our stay was at a weekend it was free for on street parking.