The 'smart' apartment had some lovely original features and once we met with one of Daniels's representatives after some initial communication troubles we quickly made ourselves at home.
The apartment is spacious and quite warm, particularly at night, with the windows open there's quite a lot of traffic noise and noise from people walking by, this didn't cause us any major issues, but if you were a light sleeper or need to be cool, just be aware of this.
The shower within the 'proper' bedroom is very nice to use and very powerful, privacy is an issue if you would like a secluded toilet visit as you can hear every sound through the gaps around the sliding doors.
The beds are very comfortable and large and there are all the basic amenities you need and a host of cafes and restaurants within walking distance. There are 2 U Bahn stations within 2-3 mins walk which was one of the best highlights.
The flat has a lot of character and is very modern, our only real criticism is that if you're staying with another couple/other people; the second 'bedroom' is actually in the living room/next to the kitchen, and there is no door, so there is no privacy at all, you have to walk through this space to access the kitchen, and the second shower is IN the kitchen.
Kitchen lacks storage space but had all the basics you need, beware the flies/mosquitoes if you have the windows open at night!
All in all we found our stay super convenient and luckily we are 2 close friend couples so we didn't have too much of a problem with the sharing of spaces but it may not be suitable for all.