Pros: The Sleep Better Iso-Cool pillow is filled with memory foam, but the outer cover senses changes in body temperature and cools or warms accordingly.

Cons: The pillow may be too firm for some sleepers, and the cover may be a little stiff.

Summary: Customers give this pillow high marks for good support, as well as staying cool. They have noted the cooling effect may not last very long, and it's not good for sleepers who want a cool pillow all the time.

Pros: The Serta Perfect Sleeper pillows are decent quality pillows for the price. They are fluffy and of medium firmness.

Cons: Users say the pillows go flat after a short time and the seams may come apart.

Summary: This is an affordable pillow, but isn't truly outstanding. Users have said the pillow will fluff back if it goes flat.

Pros: The Perfect Fit Firm Density pillow is good for back sleepers and does have a firm feel. The sidewalls help keep the pillow from going flat.

Cons: Seams may come apart, according to some users. Also, the pillow may be too firm for some sleepers.

Summary: An affordable pillow of good quality. Buyers will want to consider whether the pillow is firm enough, or if it's too firm.

Pros: The Buckwheat Pillow hulls allow for air circulation and keep the pillow cool. The hulls also conform to the sleeper's neck and head and provide good support.

Cons: Some users say the buckwheat hulls are noisy and inhibit sleep, and that the hulls may also shift during sleep.

Summary: The Buckwheat Pillow is lightweight and shapes easily to the sleeper's individual head and neck. It stays cool, which is a plus for those who like the cool side of the pillow.