You have NO idea how much I needed this!! My old bed, though very expensive, was over 10 years old. I have a terrible spine. Herniated and bulging discs, arthritis throughout my spine and more. Every single day I'd wake up in pain and never slept well. Enter this beautiful gel mattress! I was very skeptical and I didn't have a platform and my box spring is Queen size while the mattress is full but it is absolutely perfect! I have slept on it consistently since day one (it takes up to 48 hours to fully expand, I understand) and I have slept like a baby! Finding the mattress that fits your precise needs I'd very difficult and choosing online even more so but I hit the jackpot here!! It's firm but not hard. It's sort of like a memory foam but it isn't. It is, in my opinion THE perfect combo of firmness and softness.