A great deal
I don't understand some reviewers. Marina Inn offers a decent room per usd 100/120 the night in a very nice location in SF. Close to the buses and 10 minutes walking to Fisherman Wharf. And that is a fantastic deal. Ok, the breakfast is not so good. But with the money you have saved you can have breakfast anywhere you want.
The staff was very helpfull and the overall experiencie was perfect for me.
Try to ask a room facing Octavia St. It's gonna be quieter.
The only problem is that the Hotel has no parking. Is tough to find a place in this area. Three blocks away there is a parking. The maximum you will pay there is 22 usd per day.