Anna's place was a real gem and I would highly recommend it to anyone staying in Prague. We made arrangements with Anna prior to our arrival for an early check in and it all went very smoothly. She met us at the apartment, showed us around and included lots of tips for us during our stay. Despite the central (and very busy) location, we found the apartment quiet and had no trouble with street noise at night. It is an extremely large space with more than enough room for two people. The bed was large and comfy and by European standards, the bathroom and kitchen were very spacious and well appointed.
We had breakfast on our first morning in the cafe located at the bottom of the building (as recommended by Anna) which was great and fairly priced. The Prague castle was a very short walk away and we utilized the trams from Malostranske Namesti (about a 2 min walk down the street) several times during our stay to get to other parts of town.
All in all, a wonderful host and apartment and I would definitely stay there again.