Just got my mattress a week or two ago and every now and then I can feel a spring “pop” or move out of place. Only time I’ve ever encountered this on any of my other mattresses is when it was time to replace them, but this one’s new 

I’m also a sidetummy sleeper and this is not it for me. I wake up with a sore back unless I force myself to sleep on my back. As long as I can stay that way all night (which I can’t most of the time because I move around a lot) then I am good to go. 

Other than that the mattress is very soft. Feels like sleeping on a cloud but sunk in. If your like firm this is definitely not that mattress for you.