Dusan was an excellant host, when we arrived, he explained us everything and showed us on a map where were interesting places to go. He is also helpfull and if you need any information, recommandation,.. you can ask him and have a real quick answer.
The appartment is really easy to find and has a good location (15min walk from the center and there are aslo tram leaving near the appartment to go there).

We had an amazing time in Prague!