We had a fantastic stay at Ondrej and Alena's place. The location is incredible, in a beautiful neighborhood in Prague that is worth exploring on its own, but also within walking/bus distance of the Old City center and Charles Bridge.
Ondrej was extremely communicative and helpful in suggesting restaurants, things to do, and even offered to take us outside the city which we would have done if we had more time. I highly recommend staying here and will stay again the next time I am in Prague.