I bought a queen size for a guest room to put on top of the Gerd Solid Wood Platform Bed  (also from Wayfair). I think it’s a comfortable mattress. Guests have said it’s a comfortable bed. It is firm with a bit of cush on top. I got a good night sleep. I didn’t get too hot so the cooling technology must be enough. 
I’m very happy with this purchase. For the price of the mattress & the platform bed, I think I got good value at this price point.