We've been with OVO for a number of years. However last year, after a switch to a smart meter, we found our bills became very high. I'm a physicist so I did some tests on our side of the meter and things didn't look right so I ask OVO to review our meter. OVO's customer service was so poor we ended up at the Ombudsman who upheld our poor customer service complaint. During the whole process, we could get a single person at OVO to take ownership of the problem, and promises that it would be escalated to management were broken. We are now leaving OVO as the metering problem has still not been addressed. OVO has grown considerably and they are highly dependent on their automated systems. This is a problem when things go wrong. OVO are at the cheaper end of the market and like everything in life you get what you pay for.