Short version review: Believe all the positive reviews about Marsha's place and hospitality. She's a 5-star host with a wonderful location and really great value for the area.
Longer version review: Marsha is a gem of a host unlike few I've met. This was my 1st time visiting San Diego area and boy am I glad I picked her place to stay as I couldn't have picked a better area from which to explore while also getting a real feel for what it's like to live in the La Jolla area. Her house is in a nice residential area neighborhood within short walks to anything one might need including food, drinks, groceries or enjoying a nice sunset (which I would recommend you don't miss).
I staying in the room in the main house (she also has a cottage annex) and shared the bathroom but didn't feel like it because I never had to wait or such. It truly felt like I had my own private bedroom AND bathroom. Wifi worked flawlessly. It was the coldest temperature when I visited but Marsha ensured that my room was kept to a comfortable temperature which was really appreciated.
Cherry on top is probably the self-made breakfast for which Marsha provided everything one might need regardless if you like bagels, yogurt, eggs or fresh fruits in the morning. I enjoyed it two of the mornings I was there and it was really filling.
Not sure what else I could add that hasn't been said other than you won't regret staying with Marsha.
FYI I traveled solo, male in mid 30s.