I can fully recommend Erika's place. It is conveniently located if you want to go to Berkley or Oakland and it is within 5 min walking to the BART. The room is great, the bathroom clean, and you can use the kitchen. Erika is very friendly and always willing to have a chat or to give you helpful tips. Don't stay here if you are afraid of dogs, though, as her rescue dog is quite scared of strangers and therefore barks at you occasionally.