This is an amazing apartment in Prague and a great place for a large group to stay. There are four proper double beds, plus three single beds on the floor and a children's trundle bed. We also got a pack'n'play / crib for our child which was great.
The service was incredible, they greeted us at the door and were quick to reply to any issues.
It is a penthouse and 6 stories up (150+ steps) and the lift is quite small. The balcony and view are incredible, but you can't really sit / relax and enjoy the view (the chairs are too low). The beds on the floor are truly that - beds on the floor. We had 11 people there with two young children and really enjoyed the stay. Location can not be beat and again Michael and his team were excellent.