I used one on day one at the Mountain View Supercharger - at the Shareholder meeting this past June '15. Even had a chance to talk with one of the Tesla Supercharger people. He/they wanted to know what we thought about the liquid-filled.
Are they still at Mountain View?
I've been to new Superchargers, opened since then, e.g. Manteca - haven't seen them since.
Has anyone seen them anywhere else? Are they only going to be used at Superchargers that have extreme temps, hot/cold?