The service has been good with ovo, however more recently I have noticed a change. Since i swapped over my utility company I have been good. I noticed it getting much higher so i contacted ovo and they checked it out. They responded to my query very quickly in December and I thought great. 3 months later they state they got it wrong and now they want me to pay the money back. I've not been happy and as a result they have put me in arrears. They have been apologetic but want me to pay them back. I also noticed the payments have doubled in cost all of a sudden as well. They seem to think this is ok, and then want to offer hardly anything for the mess they have made. Once this is all resolved i want to stop using ovo altogether and move to better provider who can read and charge the correct amount from a smart meter and one who do not put me in arrears. I would say be very careful when using ovo.