Is good mattress guarantee better sleep?

My partner requested me to change our old mattress, because it's very uncomfortable and it makes sleep problems to her. Is a mattres guarantee better sleep? 

Didn't do me a lot of good but it could help your partner. When I am really bad I sleep on the floor it helps and once I have slept a little there I am able To go back to bed. No idea how or why it works.

You need a matress change ever eight years.

To get a good nights sleep your body needs to be supported.

Too firm and you may find it too hard, make sure you try these mattresses out.

Purchase without sight and you will repent at measure.

Hope it helps!!

Try using a mattress topper.  It makes an old mattress more comfortable.