I stayed 5 days at Marina's awesome little studio in San Jose. I met her shortly after my arrival, she was very kind and welcoming, and she stayed in constant touch with me throughout my whole stay to make sure that everything was good and comfortable.
The studio is absolutely private and quiet, with its own entrance, its own bathroom, and complete with a refrigerator, microwave, bottled water, and coffee. There's also off street parking. Everything was sparkling clean and comfortable.
As for location, I had to commute to Mountain View every day, and the commute was easy and quick. There is also a grocery store which was open at night nearby (I walked to it one night), and lots of restaurants only a quick drive away.
All in all, Marina's place is a great value and an excellent choice for anybody needing to spend time in Silicon Valley. I will definitely stay there again next time I come to Silicon Valley, either for work or vacation.