I strongly recommend this place which is really well thought, super super functional and clean and nice.
However, we didn’t get the flat we paid for (we realized after 24hours when comparing pictures) obviously the one we got (although very nice) was not as nice as the one on the pictures.
Don’t expect to use the wifi, it is not reliable at all.
Anyway, the general feedback is really very very positive. The concept is perfect when visiting large cities.