These were perfect for our application. One king and two twins. Make sure you select right weight capacity to make lifting and closing easier. I had to install some 2x4s in the twin frames to ensure correct clearance. MUCH easier to install if you have a power screw/drill driver! Once installed they work like a dream.
Works great, lifts and holds a queen mattress with ease. added a ton of storage space and is easily accessible. Came with directions that were easy to understand, one read and didn't need them any more.