Mary's place was very nice. The bed was comfortable and clean, and the bathroom also. Maria was very thoughtful and helpful while we were her guests, and responded to our questions very quickly.
The location is fine if you have a car, in fact everything is easier if you have a car in L.A. A shared ride with uber or lyft from Pico Rivera to Hollywood or Santa Monica is around half an hour (in little traffic) and costs about 30 $ one way, if you don't do the shared ride it will cost you about 80$. So car is crucial!
We were told we were not in the safest neighbourhood but we felt safe and welcome. Just some food for thought.