Atrocious mattress - super springy and bouncy.  When one person in the bed moves, the other person feels it too. Horrible, horrible, horrible.  You can hear the springs 'ping' when you move, and can almost feel the springs. There's no chance of a comfy night's sleep.  I'm really surprised because SilentNight as a brand sell themselves on comfort and I thought the pillow top bit would make a really comfy sleep, but wow, I was really wrong.  Am now beginning the process of getting this returned.
The only good things: delivery is to the room your choosing (bear in mind, it's delivered in one piece, not rolled and weighs 33kg) and the chemical smell goes after a few nights.