I had a stay in Martins apartment during a work related trip. It's an amazing place with absolutely no noise from neighbors. Great open space where you will feel comfortable and right at home. Comfortable sofa, great shower with enough water pressure (This should generally not be expected in central locations). Bed is not too soft nor too hard. The free private parking spot also sweetened the deal as only electric vehicles park cheap in Frederiksberg.
I can definitely recommend staying in Martin's place.