The dual heads. All over their site and twitter they keep saying their the first dual head. It looks like a decent affordable printer, but that kind of speak is just irritating. It is so far from being the first that it is silly.
Find your strong points and brag. Maybe they're the cheapest? easiest to use? who knows. They're not the first though.
That is a peculiar feature for them to boast about. Makerbot and several reprap varieties have been doing this for years now. I think makerbot advertised being the first back when they made the thing-o-matic! Even then people had been doing it on repraps already.