The mattress is superb, having searched the High Street and internet this was the best mattress to suit our needs. It was delivered promptly and was comfortable from the first night. Suffering from a lower back problem this is the first mattress to give me a good night's sleep in ages. Would thoroughly recommend!! Excellent price as well. 
A word of advise is to make sure you air the mattress well before sleeping on it due to the smell from what I guess is the fire proofing treatment, not offensive but strong.