I've used that one a couple times too, never seen anyone at it... weird location behind a building, but panera is right there...
Yeah, but handy for some less-travelled routes. I've seen other people there a couple of times.
Thing is... that's probably the TYPICAL Supercharger experience. Light use. It's only in CA and at a couple of places on the East Coast (Darien, CT say or Newark, DE) that you see a bunch of vehicles. One hopes that prior to M3 release Tesla will finally update the nav software to include feedback on site utilization, which could easily alleviate most congestion... on the I-95 corridor alone, for example, there are a top of SC options in NJ and CT.