Staying at Ondrej and Klara's place was perfect! Ondrej sent me a lot of useful insider information in advance, so I could easily plan our stay! They also gave us information about current events taking place in Prague, while we were there. The apartment's design is really awesome and exactly how it looks like on the internet! All in all a wonderful weekend! Thanks again!
I highly recommend this hosts!
Ps: by the way they surprised us with original Czech beer and prosecco for the lady! ;)