Serta - Perfect Sleeper Mattress Review

My wife and I purchased the Serta Perfect Sleeper queen mattress and bedspring and it developed the body caves within the first year. We both wake up in the morning with back pain and find it hard to sleep at night. Our last bed was purchased for $300 mattress and bed spring from someone selling them on the side of the road, that bed lasted 13 years and we would rather have that bed back now and dump the Serta! We are looking to replace our Serta now (it is still less than 2 years old!) and we will never by a Serta again!