I just got my mattress replaced under warranty! It took a lot of time and effort, but it paid off in the end.
My mattress began to break down almost immediately. By the 9th night sleeping on it, my wife and I kept rolling into the middle of it. I didn't expect a great mattress, but I expected to be able to lay flat on it for more than 8 nights! I had to take pictures and submit them to my dealer on 2 different occasions.
Unfortunately, Forest River did NOT honor the warranty. Luckily, my dealer sent the info to Michiana Mattress and they did honor the warranty. They sent a replacement mattress and asked me to bring a square foot of the bad section of the mattress to my dealer when I picked up the new one. I took the entire mattress, because I couldn't dispose of the rest where I have my unit stored for the winter.
Anyway, kudo's to Michiana Mattress! (but NOT Forest River)