Our previous mattress was 7 years old, and was a very firm coiled spring mattress. I hated it right away, but we spent over $800 on it so I wasn't willing to give up on it. We use a platform bed, so no box springs....just the 10 inch mattress on wood.
This mattress was a big change from the coils. It has taken us a couple of weeks to get used to it, but it is SO much more comfortable. I'm not waking up every 2 hours because of back pain. It is soft yet firm, but it could be just a bit more firm. (Thus the four instead of five stars.) We do sink down into it more than I expected, so sitting up and standing is a little tougher than before, but it's not to bad. And I LOVE that it is flippable. I think that makes a big difference in keeping a mattress in good condition.
For the price, it is an excellent purchase.
