To be fair - OVO were really good up until something went wrong. Customer service however was good. New Years Day - their smart meter failed at midnight (so a software fault) and my gas supply was cut off. Left with no gas central heating in winter with a 2 and a 4 year old in the house. Gas finally restored on 4th January but on a pre payment meter (but not provided a top up card). To make matters worse - was now stuck with OVO as my new supplier wouldn't take pre payment meters. Had to fight OVO to install a credit metre again over around 5 hours of phone calls - at the moment, I'm stuck on out of contract rates with OVO due to no fault of my own. Update - the meter is now being replaced today - however, my switch to a new supplier has had to be cancelled - I have now had to signup to a new supplier (at higher rates than offered before Christmas and I will be on Out of Contract rates with OVO until that delayed switch takes place - REALLY NOT IMPRESSED