I wanted a firm mattress but I haven't tried a hybrid before, I searched for hours before deciding on this one and I'm really happy with it. There is just enough memory foam to let you feel comfortable but also plenty of firmness from the springs below. I've had it about a month now and it's still feeling firm and comfortable.The sides don't collapse and you don't roll off the bed, I'm a single sleeper but when I got the mattress I did get my mum to lie on it next to me and we are very different sizes, but neither of us disturbed the other. I don't feel too hot or too cold at night, but if I had to say, it would probably be a little warmer than my previous very cheap spring mattress. The delivery was super easy and quick, it was next day and came rolled up in a box, it very was heavy to get upstairs but I managed it alone once I'd got it out the box (still rolled up). You need to undo the first layer to unroll it, and then cut the second layer to let air in so I had no problems getting it where I wanted and no exploding mattress scenes as I've seen described in other reviews.Overall super happy with the mattress and the price. Time will tell how it wears but so far so good.