Staying in Christina's home was perfect. The accommodation is wonderful; while we did not spend a lot of time in the house its certainly better than you would think from the advert/pictures, and we were delighted to stay there.
Location wise it is ideal. Around a 8 minute walk from the California station with quick/direct access to all points downtown. The area is nice, we felt 100% safe, even when returning home after midnight.
I would reccomend both Christina, and her accomodation without reservation.
My advice is book with Christina, you wont be dissapointed.