I'm in the process of buying one (2015 Energi) and the only way I even knew about it was b/c it was on my state's Clean Pass list (NY, Long Island). Having HOV access was the main reason to look at a Hybrid/Plug in type vehicle. Normally, once I target a car, I begin to see it everywhere. But in the week I've been looking, I've only seen 1 C-Max on the road.