Great purchase! The topper is just the right size and density for our Queen Sleep Number bed. My husband adjusted his side slightly (he needs more firmness) and we've been sleeping beautifully. The Memory Foam gives a feeling of luxury I missed when we replaced our pillow-top Stearns & Foster mattress a few years ago because of back issues with my spouse. Love the zippered mattress cover. Overall, an A+ and worth every penny!