If you are travelling to Prague for either a short or long stay, I would highly recommend you consider staying at Carstens apartment. It is exactly as described and bigger then the pictures make it seem.
On our arrival from the airport - for which Carsten organised a private transfer - we were met at the front door and shown through the apartment and given plenty of information booklets and also a tram tickets. He then offered to take us around the area, during which he showed us many places to eat and drink and other convenience shops. He shouted us to our first beer in Prague and then showed us an awesome view.
A particular burger and beer bar "Zelva's" that he suggested, I would recommend anyone visit if you are up for a really great burger and service.