I bought two of these and you did not require the Serial numbers

I'll get a full night's sleep in this bed.It's great

Good support for our back and hips. Comfortable top.

Very comfortable

Comfy

While initially comfortable, the mattress is breaking down in less than 90 days slept on. I’m extremely disappointed with this purchase.

The comfort is amazing. The mattress is somewhat firm but still forms to my curves. I also live the calm and stillness this mattress provides. .

I traded a firm which was very soft- I’d guess medium at most, but the extra firm is perfect for those who prefer a firm bed.

We are both side sleepers. Our Serta Lexton Mid Point pillow top is perfect. Just enough firmness with cushion at a pretty affordable price.

Perfect firmness for both my wife and my needs. Slept like I didn't have kids waking me up every few hours again.