This is a very spacious apartment in a good location (S-bahn and U-bahn in short walking distance), supermarket and bakery also around the corner. The apartment was clean, the kitchen equipped with everything you need.
There are two proper bedrooms and a large living room. We stayed with our family of 5 (kids are 16 and up in age). They shared one bedroom. As a family we managed with the one toilet in the bathroom and two separate sinks in the walk through to the kitchen. If you are with more people/not family group, we can imagine this can be a bit of an issue.
Communication with the host (or representative) was very easy on whatsapp.
For us this was a great apartment to use as our base to explore Berlin from.