Have always had a waterproof mattress protector on it, so it hasn't had any sweat through it and it's still mint as.
Plush, but supportive.
Pocket springs are still good.
I wouldn't sit on the sides for a long time though, unless you want a debt in it.
All in all, I'd buy another one if this one got wrecked somehow.
👍 👍👍👍👊 (That's 4½ thumbs out of five)