Do not hesitate to book!!! For the price, location and cleanliness, you'd be nuts. One room is big enough for about 3-4 people. There's a bed and a futon. I have stayed in something very similar and had a horrible experience and was weary of booking Mary's home. It was totally opposite!
For a home with multiple people, it is SO CLEAN.
Do not worry about the fact that you do not have your own bathroom. There are 5 rooms on each floor and 2 bathrooms on each (I basically had my own bathroom)
The only thing that sucks is street parking but hey, it's LA!