Awful, awful stay. No hot running water for the whole trip (5 days) meant we spent hours heating pans on the stove and eventually ended up paying for a hotel instead as nothing was ever resolved. Boiler was totally broken and heating did not work. Contacted the host but nothing was resolved for the entire week. The bolier had a dodgy flue stuck together with mastic and a broken casing barely staying on complete with scorch marks all over it, clearly this was not going to work from day one.
Phonecalls resulted in 3 visits from technicians who had no tools or ability to repair the boiler stretched out over our whole stay.
I travel a lot - never had a reason to complain before, I'm very easy to please and really only wanted somewhere to sleep and wash but this place was genuinely completely uninhabitable. Utterly disgusted that we were left with this and no alternative accommodation provided. Still in disbelief.
On top of all that: Toilet broken, blocked and absolutely stinking. Damp everything. Flat is very, very dated dirty and in need of a redecoration about 10 years ago. Rooms pretty grubby as was kitchen. Not the cleaners fault but needed an thorough deep clean and refurb. Something to bear in mind is that steps to apartment (4th floor) are VERY steep and numerous, NOT for anyone with even minor mobility or heart issues. At least though you will be warm when you get to the freezing apartment with no heating or hot water :) Bring extra blankets.