I've now been sleeping on this for a couple of weeks. It's very comfortable and supportive, mainly down to the pocket springs. I know there are more expensive options available, but honestly, this is the best value for money.
I originally bought it for the master bedroom, but loved it so much, bought another for the guest bedroom too.
It's a very heavy mattress, so make sure you have someone helping when putting it on the bed! This is testament to the build quality for sure.