I purchased a Simmons ComforPedic Advantage Ranger  earlier this week. I really liked it's firmness but now I am not sure if it's quality is any good. As I can hardly find anything about it on the internet in terms of reviews and specs. Also I found it to be 160 dollars less than what I paid for which bothers me. So here I am wondering if I should look for something else, I paid about 700 for it and I just want something to last me at least 4-5 years and still provide me comfort as I wake up with a lot of lower back pain and soreness in the morning thanks to my current mattress.

Please help!