The flat floor and its large width allows to put it on a windowsill, it remains stable. Exit therefore the hook at the rear chore.
Since the purchase (one month) only a solitary bee came to work + a spider. But I'm not worried, we must be patient so that the inhabitants take possession of this type of housing ... I bought last year for a solitary bee observation hive that has seen its first occupying land in spring 2015.