Customers report that this product significantly enhances comfort, making old mattresses feel new and providing a restful sleep experience. Many reviewers find it to be a great value, saving them from purchasing a new mattress. The quality is generally praised, with the product fitting well and not shifting. However, some customers have experienced issues with the size, with the product not expanding to the full dimensions or being the incorrect size altogether. While many reviews mention no odor, a few note a smell that dissipates over time.