Love this product! It arrived ahead of schedule, boxed well and easy to unfold. Followed the instructions to let it air out (but there was no chemical odour to speak of). This mattress topper has evened out the low areas on my existing king mattress for a restful and painfree sleep experience. The only con is that is does not have a cool gel experience as I had hoped. Otherwise, this product would have earned a 5 star rating. I would still recommend this product based on its  overall comfort, reasonable price point and sleep success. Nice job Wayfair!