Absolutely excellent, I have a twin meter system with two MPAN number and most of the other green providers would only transfer me, if I paid two standing charges. Bulb however recognised the set up, and only charge me one standing charge. Meter readings are easy through the bulb account, I stick both readings in, and only get one bill. Switching was very easy, absolutely no problems, only dealt with bulb, even for the final reading to the previous supplier. Paying by standing order is simple, and you can amend details through your bulb account. Bulb was also cheaper on both my tariffs. Absolutely recommend Bulb, ethical, cheap and hassle free. Ten out of Ten.