The air con failed during a heatwave — in a modern flat that faces west and has no proper ventilation, is designed for air con. Our kids couldn’t sleep. I had endless back and forth with Houst - the agency running the flat. They appeased me with promises they didn’t deliver, and after a lot of complaining they refunded part of our cost, but it was an ordeal that ruined our stay. We left after two nights of a planned 6 night stay - spent a lot of our time changing our plans instead of enjoying the city. Houst, I now think deliberately, advised me of the problem when it was too late to make another booking elsewhere. We later booked another flat managed by them - an accident! - and experienced similar treatment.