Appartment was not clean, with especially bad smelling sheets as if not refreshed; the heating system was very noisy and cannot stay on whilst sleeping, meaning it became cold at night. Sound of neighbours and street in the night was also disturbing. Host was not willing to accept my claim and I cancelled my planned second night. Given other comments, this was probably an exception or error, but I did not feel the host took my complaint serious, which is a shame as my experience would have been very different as I understand mistakes happen...