We are a group of 8 people and we stayed at Petr's place last 12-15 of Dec 2019. His place is really good for a big group like us. He's got 4 double beds in his unit, so everyone slept comfortably, and 2 bathrooms, making is easier and faster to prepare/get ready. His place is also just around 2 blocks away from the Wenceslas Square (where there are some Christmas Markets). Everything seemed walking distance from his place.. There are Mcdonalds, KFC, Starbucks nearby if you want food. From there you can also walk to the Dancing House, Old Town Square (more christmas markets and the astronomical clock,etc) for around 20mins.
Petr also helped us with our transpo from the airport making it more convenient for us and you can easily contact him if you need anything.
Overall, we're satisfied and would recommend his place!