Even though the location is spacious and convenient to all the tourist attractions, we sadly encountered a few problems while we were there.
Please be aware that if you know where you're going, it will take you at least 6-7 minutes to walk to get the apartment's keys. Be prepared to walk on cobblestone with your children and bags if you are coming with them (oh and it might also be raining). Furthermore, there is no elevator/lift, so you must climb numerous flights of stairs with your luggage.
Additionally, there is no opportunity to drop off your bags, and the check-in time is not very flexible.
One bedroom's mattress was extremely uncomfortable to sleep on since the spring coils pierced your back. Unfortunately, for more than half of our time, we were without internet access.
Kitchen supplies and toiletries were scarce, in our opinion.