Billy Bob's is a great place to buy a mattress, but I wouldn't recommend them for anything else. From a very basic mattress at an ultra-cheap price to high-end mattresses, they are certified retailers for many of the top brands. We got more of a middle-of-the-road full set with pillowtop and were very happy with it.
We also bought some furniture including the rails, head and footboard. This turned out to be made of particle board beneath the veneer and fell apart very easily. Since it was dirty cheap with mattress purchase, I guess you really do get what you pay for. We would buy another mattress from Billy Bob for sure, but nothing else.