We loved the design and concept of WunderLocke and the staff was always very friendly and attentive. I think the hotel will be pretty cool, once everything is completely finished and runs smoothly.
Unfortunately that was not the case during our stay: when we booked, all the perks of the hotel were advertised but when we arrived, we had to find out that neither restaurant nor swimming pool were finished and we were woken up by construction work in front of our window every morning at 7am. It would have been fair to tell us about this before our arrival (our daughter was pretty disappointed as she had been looking forward to the pool and we would have liked to sleep in during vacation).
Additionally, some things were missing in our room: a lamp on the Mezzanine level (we were told repeatedly a technician would fix that, but it did not happen during the eight days we staid), sweep set, bedding and towels for our child and dishwashing sponge. Furthermore it gets very hot on the Mezzanine level and the AC does not allow a lower temperature setting than 21 degrees Celsius - too warm for sleeping.
As the hotel is designed for longer stays, the rooms are supposedly cleaned every seven days. I suggest, if guests stay (like us) for a week, there should be a cleaning after three or four days, not only after check out.