We did a bunch a research when looking for a new mattress after living in Hong Kong for 2 years. We had the Hovag mattress from IKEA and were needing something much cooler as my husband sleeps really hot and Hong Kong temperatures can be intense. We ordered the NOA on 7 May and it came on 11 May. We left it to expand for a night and then have enjoyed sleeping on it ever since! I honestly don't notice a difference in temperature because of I wear multiple layers to bed, but my husband swears he sweats less at nighttime now. I did notice that this mattress is way more supportive and I don't have as much soreness in my hips and shoulders (we both are side sleepers) as I had on the previous mattress. I will say it takes a few weeks for the plastic smell to dissipate though. Overall, I would totally recommend this mattress and company if you are looking for a "mattress in a box"! Really great bang for your buck!