We are with Octopus and have been for about 4 years, no problems at all, prior to that we had three nightmare years with the utterly incompetent Scottish Power, which ended with court action to recover the four figure sum we were owed. When we get the car, will change onto one of the overnight/evening tariffs to allow cheaper charging and also take advantage by using high energy items, like the dishwasher, tumble dryer and washing machine after 9.30pm.