Location, location, location. Superbly located, very clean and well-equipped. Comfy beds, hot and powerful shower (in a bath) and the washing machine was a true perk, with detergent supplied.
My only complaint was finding the check-in location, following the long instructions to do so on a touch screen which required several attempts, then obtaining the information regarding the address and number of the apartment located a walk of some 10minutes away. Side streets are one-way so walking with luggage was the necessary option.