We stayed at Sarah & Matthew's place as a group of 5 friends. The place is really impressive, and there is plenty of room to fit more people. The beds are comfy, and the bathrooms equipped with multiple towels for your stay.
The location is perfect for a stay in Prague. It takes less than 5 minutes to get onto the main street, and you are overlooking the river. The building is really secure, with a heavy duty front door, an internal gate in the stairwell and another door at the front of the building. There is a lift too.
Only small comments were that it doesn't feel as well maintained as the pictures suggest it should be. The tap in the kitchen was loose, and there weren't many glasses, so if we had been a bigger group this would have been more of a problem.
Overall a fantastic stay though, thanks!