Any UK EV owners with Octopus Energy?

I'm already with Octopus, but I've just had a smart meter installed, so I'm looking at moving to one of their EV tarrifs. These seem like kind of a no-brainer, but I'm a bit suspicious. It seems sort of too compelling.. what am I missing?

I'm currently paying 29.26p/kWh and 53.96p/day. Both EV tarriffs are 29.56p/kWh, so only 0.3p more, and the standing charge is the same. But, both tarriffs offer cheap overnight power; Go offers 4 hours at 9.5p/kWh, and Intelligent offers 6 hours at 7.5p/kWh (so why would you ever choose Go..?). I guess you'd choose Go if you can't or don't want to link your car's API to Octopus, but I see no other disadvantage).

Is anyone here on either the Go or Intelligent tarriff? Any regrets or non-obvious gotchas to watch out for?