This mattress is merely ok. It only took one night for me to be able to feel every spring. Though they are not painful it does make it uncomfortable.
I also noticed a dent where I had slept. Apparently I lay pretty still. I’m also fairly small. It’s been several months now and the dent is now permanent, I think and it’s several inches deep.
Would I buy it again I don’t think so but you buy what you can afford.