I have this insect hotel in April under eaves to the wall mounted, so that there is no rain abbekommt basically. days after the first few rooms were occupied, mainly small wild bees and parasitic wasps were very happy about the hotel! after 4 weeks were zugekittet over 50 holes and the second highest floor with the thicker branches was almost fully booked! if I saw correctly even begin the first animals to hatch and the holes can be re-inhabited.
I am absolutely thrilled, it's very interesting because the hotel is always something going on. Therefore it is an optical enrichment for every garden. I'm curious whether the winter actually butterflies and beetles overwinter in it.
I can only every garden / balcony owner recommend an insect hotel to purchase, it does not have to be equal to this luxury for 40Eu or tinkering with little effort even one that costs nothing :)