I bought this Incline Mattress Topper with mixed feelings, because some reviews were negative (lingering "plastics" smell, does not fluff up properly after unpacking), but I had none of these problems. I unpacked it and placed it on a guest bed for about 2 days so the mattress could unfold properly. It IS packed very tightly and I had to struggle to get it out of its plastic bag, but after 2 days it was straight, and the smell was almost gone. I've placed it on my bed and have been very happy with it. On a flat bed I get very congested and often snored. This has much improved. I also tried wedge pillows before this, but kept sliding downwards and had neck pain the next day. I'm very happy with this product. But yes, you DO need mattress covers/sheets with very deep pockets!