Me! Me! I have one! I’ve had mine for over ten years and I really like it. I went for the cheap one and put it on a platform from Ikea. I like that I can adjust the firmness depending on my needs. It never sags. Sometimes, if my back is a little wonky, I need it firmer, so I put a cheap foam pad on it (softer on my arthritic joints). But really, the adjustable firmness and the never-sag aspect are what still appeal to me.