We had a great time at Dan's place. Dan is a great host - it was very easy to communicate with him. Although we were probably not the easiest group (a window fall out and we ruined the door knob - see below) Dan was very understanding. The apartment is lovely and the outdoor deck is amazing - we spent a lot of evenings there.
As already mentioned, we had some serious issues with the door, as it was very hard to open (for all 4 of us). On our second day we ruined the door knob. But Dan already told us before that he will replace it, and he already bought a new one. So I guess the next guest shouldn't have any issues with the door anymore.
As the beds were super comfortable but smaller as expected (it was our failure not to ask) we ended up sleeping on both couches in the living room, whereas this is not the plan for the one couch :) A couple or really close friends should be able to share the two beds, for us as student colleagues and as we spent 7 nights there it was no real option.
Altogether we had a great time at Dan's place and we would definitely come back!