German's place was awesome for our group of 6. Beds for everyone, plenty of space in the rooms and shared spaces, and great hospitality! The place looked just like the pictures and was very comfortable.
Be prepared - it is on the first floor, so you do have to go up a set of stairs. Not a problem, just nice to know in advance.
There is no air conditioning, as mentioned in the listing, and only one fan. It would have been nice to have a fan for every bedroom, especially as it was very hot during our stay.
Would definitely recommend and would consider this place again if visiting Prague with a large group!