We stayed for 2.5 months with our 16-month old son and had an absolutely fabulous time. Amy was very responsive and helped prepare the apartment for our arrival by packing away some books and other items we didn't want our son to rummage through. Amy's upstairs neighbor, Marian, met us with the key when we arrived and gave a wonderfully detailed introduction to the apartment and how to operate all the appliances, etc. Marian was a great neighbor: providing help or advice when asked but otherwise respecting our privacy.
The apartment is very well located within walking distance of supermarkets and multiple parks/playgrounds. There are Muni bus stops within a 5 minute walk, and the BART underground (Civic Center) is about an 18 minute walk. We rented a car for a two weekends during our trip and were able to find parking, but relied on public transit for most our time in the city.
The apartment itself is excellent. It is large and gave our son plenty of space to run around and play. The kitchen spacious and has many appliances in great condition (large fridge/freezer with a ice & water dispenser, gas stove/oven, dishwasher, and even a waffle maker) with all the necessary pots/pans/tools/dishes/cutlery to go with them. We had two guests stay for a week on the futon with no issues. The high ceilings are great and make the apartment seem even larger. One minor shortcoming was the lack of a microwave and toaster, but, given the length of our stay, we purchased these and have left them for future guests to enjoy along with an Ikea highchair should it be needed.