This is a nice idea. The problem is longevity. I'd be willing to bet this product disappears after a few years (best case scenario) and you are left with no ability to buy new heads and end up binning the brush. So net net you probably waste more than buying a Philips/Oral-B brush that likely has 10+ years of support for brush heads, which have a far lower environmental impact than replacing the brush. In terms of cost, if you buy the well known brands when they are on sale, they're generally pretty cheap. I'll admit they do try to sting you if you buy at RRP.
