Avoid. I have been trying to switch to eco7 since the beginning of Dec. 4 phone calls, several emails later still on the standard tariff. I was told when I joined that once they had installed the smart meter the switch would be easy. 40+ days later after the smart meter fitting I am still getting nowhere. It is easy for a company that knows what it is doing to do this switch (my friend self changed on octopus instantly). Each person I talk to says something different and they all say it will be backdated but won't confirm how. If they can't read the night usage how can they charge 2 different rates (they can't is the answer but no one will say this to me, instead they avoid the question). I am now drawing from the grid on the night and my inverter catches all this data so I have evidence of my night usage even if UW don't. Queue time to contact them via phone is 30 mins +. Everyday they don't sort this costs me £1.38. I am taking this issue to ofgem and cancelling my direct debit at the end of the week. Angry customer. 😠 joined on false pretences and spent more money than sticking with my current provider and or switching to octopus go. Update I am apparently a priority case now but I've been that way for a number of days so if you don't complain you will be in a standard queue. If priority is nearly a month and half then non priority you might get your request dealt with in 2023.