I have had the mattress for some weeks and I am waking from my sleep feeling well rested and ache free.
The smell from the mattress does take a week to dissipate, and for the mattress to fully expand. It is worth the wait. 
Excellent value for the price. The big added bonus was the free pillow! Slim enough for me to use and small enough for me to travel with. 
I am very pleased with my purchase.