Costco.com reviews of Sealy Posturepedic mattresses are mixed, with some models rating higher than others. One of the more common complaints is that the mattresses do not hold up over the long term. Many reviews mention sagging even as early as a few weeks after purchase.
The Sealy Posturepedic Prichard Ultra Firm line of mattresses rates the highest with 3.6 out of five stars. Most of the low ratings are from customers experiencing sagging. A common positive comment in reviews is that the mattresses are firm, although some think the mattresses are too firm and others too soft. The Sealy Posturepedic Prichard Plush Euro line rates lowest, with 2.9 out of five stars. One common note in both positive and negative reviews is Costco's customer service.