I bought their queen sized mattress last year, July I think.
I get backaches when I sleep, usually due to the mattress being too hard or soft. When I first started using it, I found it too soft for my liking. For example, If i try sitting on the edge of the mattress, it will depress and I sort of slide right off, happens to my 2 year old son too which was hilarious. If I causally toss my phone or tablet onto the bed, it really bounces and can bounce right off if I use a little too much force.
I was still getting backaches but the overall experience with the mattress was good. Since I was kind of used to waking up with my back aching, and the price point of Noa was very attractive plus the 100 days return policy. I figured just keep using until the 100 days were nearly up and make a final decision.
I didn't realise it at first but after sleeping on it for about 3 months, it was only when I had to go overseas for a business trip and slept on a hotel bed. I woke up with a backache and it occurred to me that I haven't had a backache for some time.
I can say I am happy with the mattress although I mentally feel it's too soft but my body seems to disagree.
P.S: When I paid with the credit card, there were additional bank charges for processing the payment. I emailed them to ask why the charges shown were higher than what was stated. They replied to me saying that it was stated that bank charges may apply in the T&C but refunded me without me actually asking.