These are amazing boxsprings!!  I am older, and did not think these would work as well as the standard wood boxsprings.  They are soooo easy to unfold & zip up and they are sturdy and do not squeak!  I am impressed with this design!  TIP: keep the boxspring slightly bent up to fit the coversheet on easier, then straighten it out & the cover will fit snuggly~ tip it on it's side to zip it up!