It fit really well into my bedframe.  The bed already had 4 strong slats running horizontally, 3 in middle with legs to floor.  So the vertical slats of the Bunkie Board worked very well. It was simple to unfold the two halves and velcro together.  Then just slid the mattress back over and lowered slowing so as to not move the slats around.   I have a 14" heavy Memory Foam higher end mattress, so the heavy duty covering was good to have.  It also lowered my bed once I replaced the 9" box springs.  I am 6'1" and my feet would not touch the floor with the box springs underneath the mattress.    Much better now.  If it holds up over time, I am very happy with the purchase.