Me and a friend stayed at Mirko's place for 1 month for work.
It was very nice. The apartment has one of the best locations in Prague, is very clean and checking in and out are very flexible.
About Mirko himself, he is the best host I have encountered with Airbnb. He is very kind and helpful, you can ask him anything. He even arranged a doctor's visit for me when I was sick. He's always available and responds immediately to any messages. Thanks!
I highly recommend this apartment to everyone coming to Prague.
Stef.