I was on Go for about two and a bit years and it was awesome. Had the car set to start charging at the correct time each night and always worked.
Now I'm on Intelligent for the past month - I have my charger connected to Octopus rather than the car, but it works in a very similar way, except without the need for a schedule. When I plug in I get a notification that tells me the times scheduled for charging and I let the charger handle it.
Speedy thing goes in, speedy thing comes out
E: I was just quoting GladOS..... Not really thinking about the actual physics!