We purchased the SERTA PERFECT DAY mattress and have NOT had good nights sleep since. The mattress EXPENSIVE, LUMPY, and EXTREMELY UNCOMFORTABLE! Both my husband and I wake up every morning with neck and back ache. After just two months of owning the bed it developed lumps so I called Serta thinking this was uncommon. NO they said they are "body impressions" and will not replace it. I paid $2,971.35 for this bed and after only 8 months I am ready to throw it in the garbage.