I was fortunate enough to sample this mattress for free. The first night I tossed and turned and couldn't get used to it. It's understandable because it's a new mattress. Once I was able to fall asleep, I woke up feeling relaxed. After adjusting to it, I now fall asleep normally and wake up feeling refreshed. I appreciate the hybrid effect of foam and coils. It feels firm at first and over a short period of time my body will slightly sink it. As a back and side sleeper, I prefer medium to firm mattresses and this one seems perfect for me. I no longer wake up with the aches and pains of the past. I have slept on foam mattresses before and usually run hot because of it but I don't have that same problem with this mattress. My sleep has improved and I no longer feel achy when I wake up.