We deeply recommend Ondrej&Nicole"s apartment for a stay in Prague. It is very clean, in a nice area, and Ondrej is there for you all the time when you need him. He is polite, very helpful and informative.
The apartment is perfect for three people, and everything we needed was there.
It is also very easy to get around in Prague from there, several trams and metro is closeby, and it is no problem walking by foot to The Old City.