How long do Memory Foam bed last or do they have any problems?

Answer 1

usually have a 10 yr waranty, sometimes extended depending on where you buy it. I think mine has a 20 year "impression" warranty... it won't have impressions deeper than 1" (could be 2" i really dont remember) for 20 years if so replaced.
If the one your looking at doesn't come with a cover invest in one... the foam can get hot due to body temperature.

I own one and i absolutely love it... i've never slept better. Deffinitely worth the money.

Answer 2

This site says they last a long time and generally come with a 10 garuntee.