However I would be way less critical if you marketed your product as a futon/mat instead of a mattress, i.e. as what it is. And although I really like how you've done your website, your positioning and the whole simplistic approach I really think there is quite a bit deceptive advertising on your website. Like for example comparing a 5" futon with a $3K mattress in the infography, or the whole treatment of the mattress industry as like all mattresses out there are comparable to yours because as explained already in several posts.
But heck, if your customers are happy.... I probably would not change it at all. But I cannot avoid being critical with it.