I have now used the San Diego Supercharger two times, the first when I was up in that area and just wanted to find it and be able to say I have used it. The second time, last week, was when I drove my wife to visit someone close to the Supercharger so I dropped my wife off and went to charge until she was ready to be picked up. Both times I had to wait for an open slot. Last week I ended up waiting 20 minutes, then stayed on the charger for about 35 minutes. When adding the driving time from where my wife was (I could have visited also) it was more than an hour, maybe 1hr 15min. In that time I only got about $3.25 worth of electricity (as compared to my cost at home).
Is it really worth saving $3.00 an hour instead of just plugging in at home overnight? I say "NO". Plus the traffic driving south on I-805 from the Supercharger, even at 3 pm. was very bad, stop and go with speeds up to about 25 mph, then back to stop.
I do believe this was the last time I use a Supercharger here in San Diego, reserving their use for when we are on long trips, such our next trip of a couple thousand miles starting in two weeks. When I was there I met one person from north of Los Angeles needing charge to go back home (I let him use the first open slot as I was just killing time waiting for my wife). I think everyone else that I talked to and probably most of the others were local and should have charged at home on a 240v circuit. My time is certainly worth more than $3 per hour. Isn't yours? jmho