It took my birds (a lilac crown amazon & a maximilian pionus) a few days to get use to them, but now they are using them in favor of the other perches in their cage most of the time. They are a winner!
Every time my bird tried to play with it the paper would tear off and I would have to take it out of the cage and adjust it through the slot so she could repeat ..........a waste of both of our time......I took it out of the cage.