The fold up function is extremely difficult and dang near dangerous! Watch your fingers! We don’t fold it up.   I am very disappointed because I wanted something I could fold up and slide under the bed or  between the wall and dresser to store and be UNSEEN. We can’t do that, so the stairs are plopped in the way ALL DAY LONG!!  .V.   
The stairs are the tallest we could find. (Our bed is 28” tall) our dachshunds are able to climb them.