Had them last year- got a good deal, paperless statements, the service was good (always replied to emails), I could enter my readings whenever I wanted. But my 12 month deal ends in Novemeber and the new deal represents a 25% increase in standing charges, about +15% in electricity rates and about +5% in gas, so I've told them I'll be looking for a better deal. Trouble is I'm locked in for another 4 weeks and by then I bet other companies will put theirs up.Even with the increase OVO will still be one of the cheapest so I may end up staying.
Oh, they also pay 3% interest on credit balances