The place is fantastic. Modern, clean, and the central location can't be beat. We made it our homebase in Berlin for a month's stay.
Know that especially during a heat wave, the place can get quite warm as we experienced this July. Fortunately there are a few fans in the apartment. The windows are quite low to the ground so they aren't ones you can really leave open while you're gone or sleeping. The plus side of being on the ground floor is that there are just a couple steps to climb to get inside.
It was great for our family of 3 and made our summer stint in Berlin a comfortable one.