This was a pretty disappointing stay.
It started nicely -when I finally managed to get to the appartment (the host automated the check-in to the maximum - convenient for him, not so much for the guests who are forced to 'play a little game' to get into the building), I was pleasantly surprised by its cleanliness and close resemblance to the Airbnb pictures. On the bedsheets two bottles of Staropramen were prepared to greet me and my companion - an allusion to the Staropramen factory nearby in the district.
This was the first and last pleasant surprise, alas. It soon became apparent that the building is not well insulated and we would feel every gust of air on our own skin while chilling in the room. We tried to warm ourselves with baths, only to discover that the hot water supply is scarce - not enough for both of us to take shower consecutively; we had to wait for ca. 2 hrs after each shower/ bath for water to warm up again. Given that we visited in the winter, this was very unpleasant - it was cold all the time, and we quickly realized we'd be better off sitting in a restaurant than in our cold room. My partner soon fell sick due to the cold and was relieved when our stay ended and he could go back home.
Each time I asked the hosts anything through the Airbnb app, they would simply ignore me. I asked if we could leave our luggage in the hall (we arrived at 6 am, but could check in since 15) and they replied with "It would be great to go to Charles bridge :))". I asked if there was a way to turn the heater on in our room and he ignored the message. The communicated was one-sided and mostly limited to the automatic, pre-programmed messages sent from Michal's account which contained instructions regarding the check-in/ check-out procedure and a list of recommended restaurants.
The strangest part was that on the last day there we realized that the hosts had been in the appartment ALL THE WHILE. They didn't bother to come out of their room to even say 'Hi'.
To sum it up, I cannot recommend Michal and Petra's place (esp. in the winter). It sure is cheap, but super cold and the hosts care about nothing once money hits their bank accounts.