I had a good time at Frederik's place and would definitely stay there again.
Positive points:
- the location is incredible, right next to the Sacré-Cœur, and so charming
- the flat has been newly renovated, so everything is clean and new
- albeit small, the flat is still sufficiently well designed for you not to feel crammed, but rather cozy and comfortable
- both Frederik and host n'fly are friendly
Negative points:
- there is no elevator, and this was not announced anywhere
- sometimes the communication is a bit complicated between host n' fly and Frederik himself
- as one of the previous guests stated, there is the constant stagnant water smell from the bathroom, but since the bathroom itself was super clean, I assumed it was due to the old piping and did not mind it that much