I bought a mattress from them and have had nothing but a pleasure doing business with them. I'm not sure how your mattress ended up 'lumpy' but mine is perfect and I'm a heavy set guy.

I asked them through e-mail about what could make a mattress lumpy and they e-mailed me back that Memory Foam needs to be on a solid and flat surface. They make sure to mention this when you e-mail them and they even give examples of how you can use other materials on top of your box spring to make it firmer.

Just a heads up this is likely a bogus review as well. I even asked them their return policy and they said all I need to do is pack it in a box and ship it back to get a 100% full refund (minus shipping). I don't see how that's a problem? I mean you can't expect them to ship the product for free and then take a loss on shipping it back.

These guys have an excellent record and they sell high quality products. If you don't believe me go buy one yourself you'll love it.
And don't believe these jokers on Complaints Board.