stayed in private room with ensuite for 4 nights
Fantastic location in heart of downtown. Tube station 5 min away so you can get to the mission area/castro really easily.
Private room was basic but clean and comfortable.
Central heating was on in the room making it far too hot. When the window was open it was really noisy so this wasn't ideal (they had free ear plugs though).
Bedsheets/towels were not changed during the 4 night stay.
No overnight luggage storage available (note that Greyhound bus station does though which isn't far).
Watch out for dodgy homeless people outside trying to scam you (homeless people are all over SFO, not just outside the hostel).