I read other reviews before we purchased the gel mattress pad and some were not so good but there were more good ones, so we took a a chance and ordered it. So glad we did!!! All the things the bad reviews talked about wasn't there, no bad odor and it doesn't slide of the mattress and opened it up when we received it and let it sit for a couple of day and it straighten out perfectly.  The first night sleeping on it was heavenly!!! I don't want to get out of the bed in the morning. My husbands hip doesn't hurt as much in the morning, so we say we love it!!!!