Don’t get this mattress!

Where to start? After a few months I would go to sleep and sink so far down into the mattress that I couldn’t roll over without pulling myself out of a hole. Most uncomfortable bed I have ever slept in. It’s supposed to keep you cool but does the opposite, I’ll wake up sweating. The pillow top hasn’t held up at all, it looks deformed. And rotating it is nearly impossible because it’s so heavy. My last bed was firmer and hurt my hips a bit. Now this bed is a little better on my hips but I wake up with my back killing me. There is no support whatsoever. Please don’t make the same mistake I did. I threw almost 4K down the toilet and now need to save up for a new bed.