I was very skeptical about my next bed purchase. After doing a lotbif research on beds for back pain, my friend suggested a extra firm mattress. I went along with my wife to the store and personally checked the beds. The guy in the Markham store was right on to the point and gave us 3 options. We took the hardest queen mattress among the 3. The delivery was free too and it was done the next day immediately by evening. It's been a week now and we are totally in love with the comfort this mattress gives. Hint: Any mattress that is foldable is not worth buying. Always go in person and try. Thank you National Mattress:)