Good points:
Great location (far enough away from the noisy city centre area, but everything in walking distance).
Friendly staff.
Very clean room/bathroom.
Bed was really comfortable!
Good shower (and bath).
Good air conditioning.
Kettle, tea/coffee and fridge provided.
Not so good:
Bath towels not very big.
Breakfast selection dominated by salads, rice and vegetables. Scrambled eggs and beans not very warm (cereal and small selection of pastries available).
Brunch (free) - although a nice touch, this was sandwiches wrapped in cling film left on the side, cheese that was uncovered and luke warm soup. No drinks. The food being left on the side, uncovered and not in a fridge didn't seem very hygienic.
If visiting Prague again, I would consider staying here again.