The location of the appartment can't be beaten for this price. You are near the Old Town of Prague and all sightseeing wonders are within walking distance.
The accommodation can be thought of as an "AirBnB hostel". The rooms are quite clean and the beds are sufficiently comfortable. The kitchen is fairly equipped with a stove, microwave, mini-oven and bread toaster. You should note that there are 2 mini kitchens which share the appliances.
The cleaning was good in the private rooms you stay in, nothing to complain really. The communal areas could be cleaned a bit more thoroughly but I would not call them dirty.
Overall you will have everything you need and you can't find a spot in this location for a better price. Would definitely recommend travellers on a budget.