Perfect for bed made from 4in1 crib and casper mattress. We use this for our daughters delta tribeca bed.

It feels very sturdy and doesn't shift around. It seems a little noisy but that's only because it sits directly on the bed's metal crossbars. It beats the * slats the bed originally came with that kept falling down.

Assembly is very easy no additional tools needed. Even came with a ratcheting tool. Comes with a cute little ratchet to help with the job. Didn't need it, but very thoughtful given that a screw can get lost or cross-threaded.

The like another reviewer, once assembled. The slats that come with this aren't. Minus 2 for shoddy quality/materials.

The slats are stapled to strips of velcro, in order to stick to the rails of the metal frame, which has velcro on the outer long frame parts. These things aren't anywhere near as bad as the ikea ones, but they're not strong enough to prevent bowing.

The product is not wide enough to balance on the supports of a king-sized bed frame. If a king mattress is 76” wide then the bed has to wider than that. I’m not sure what king bed frame this fits.