I had a group of 7 and Michal&Michael’s space fit all of us comfortably. The beds were soft and linens were clean.
Location is great and we walked everywhere. All of the major sights were no more than a 15 minute walk.
Only drawback is the single toilet. For a very large group it can be inconvenient but not a deal breaker.
Having two showers for a large group was great. The water pressure and heat was consistent for the whole group.