We loved this apartment! Prenzlauer Berg is a beautiful area (a bit like how Stoke Newington is to London, same kind of vibe), safe and with plenty to see and do. We did lots of walking seeing the Berlin Wall memorial, checked out Mauerpark on the Sunday and ate and drank in plenty of the local cafes, bars and restaurants. There are 2 supermarkets within 5 minutes walking distance, the Senfelderplatz U-Bahn (underground) station is super close and Alexander Platz station (big train and tube station) is only a 15 minute walk from the apartment (or 2 tube stops).
The apartment is much bigger than it looks in the photos, plenty of space for 4 people (even though there were just 2 of us.) Really comfy bed, slept well due to it being so quiet. Kitchen fully equipped with everything you could need for a short break (including some staples like rice, pasta, salt and pepper etc), although please note there is no microwave. As others have mentioned, the wifi logs you out frequently which was a bit frustrating but this would be our only grumble and not a huge issue as we weren't in much!
I loved the personal touches, we loved the map on the wall with recommendations for local eateries and things to see and do. We also had crisps, fruit and water waiting for us on arrival. The hosts let us borrow an extra set of keys for one of the evening's and allowed us to leave our cases as we had a late flight which we really appreciated.
Please note, this is a very quiet apartment. You are not allowed to speak in the communal hallways and you must remove your shoes in the apartment to reduce the noise, so if you're looking for a party apartment this is NOT for you, it was perfect for us though! The listing clearly mentions the stairs, so no good for those with mobility issues or a buggy etc.