Nice find EAJuggalo . Do you have one of these? If so, how well does it work? Any downsides?

Edit: looks like it's just the standard CFEX plastic transponder that's been rebranded with a more user-friendly and multi-region-sounding name. The NC Quick Pass does the same thing and costs half as much (or, for almost the same price, you can get a version that works with I-66 in Northern Virginia). That said, it's nice that CFEX is selling it on Amazon with Prime shipping, which is good for last-minute planners. If you have the lead time to wait for the NC one to ship, it's a better deal.