How do I know if I need a new mattress?

Do I need to buy BOTH a mattress and boxspring?

My mattress is dipping...is this a warranty issue?

Does Lebeda make mattresses for waterbed frames?

Why cant I just give my old mattress set to my kids?

What all does Lebeda's warranty cover?

What do I do with my old mattress?

I have back problems, what is the best kind of mattress for me?

What do you do with the old mattresses you haul away?

Why should I purchase a Lebeda mattress?

What are standard mattress dimensions?