We stayed in the flat with 6 people and really loved the very central location. It’s a great deal if you want a good and quiet place to stay after exploring Prague.
The flat has 3 double beds (and one spare folding bed). Two of the bedrooms are walk-through (having 3 doors), and the bathroom/shower is accessed through one of the bedrooms (the toilet is separate). The walk-through rooms were fine for us since we were a group of friends, and I think for a family it’s also great.
Jiri was very helpful and communication was easy and prompt!