I already have them a little ticked at me. I bought some replacement heads from them for my Vision Vivi Nova and the heads were for a clone Vivi so they didn't fit. I went back to let them know and had to explain why they didn't fit. A customer schooling a shop owner is never a good thing.
Hard to judge without first hand experience but it really seems like these guys are clueless or even worse, intentionally ripping people off. I wouldn't worry too much about ticking them off and regardless of how this vamo deal turns out I probably wouldn't shop there either.
Oh, hey it's my 3 month today.