I stayed at Beatrice's place for a month due to a visit to Caltech.
Check-in worked perfectly as Beatrice wrote all necessary directions and informations (since the door is on the back of the house).
The house is located in a beautiful, quiet and safe residential neighborhood. The room is very nice and comfortable and has a separate entrance. Bathroom is between this room and the other Airbnb room Beatrice rents. Sharing the bathroom has never been a problem for me. Beatrice also clean it every day. You just have to remember to unlock the door for the other guest. During my stay, I also could use Beatrice's kitchen, which has all what you need. She is a very lovely host which loves to have guests and to make them feeling good. She always made her best for making my stay great.
If I will need to stay again in Pasadena, she's gonna be for sure my first choice! This place is highly recommendable.