After giving this mattress a second try (with a replacement one sent), I went ahead and contacted Wayfair about a refund. The first one hardly inflated the way that it was supposed to (the box was severely damaged, I don't know if that had anything to do with it). And I was hopeful about the second one, but it still made a large "bubble" in the middle of the mattress and did not fill out properly. Thankful for Wayfair's excellent customer service for giving me store credit and willingness to help me find the best fit for me.