So this is about energy companies, and domestic rather than business. I changed fairly recently from EonNext to Octopus. I'd heard/read that energy companies weren't accepting new customers because of the volatility in the market, but this turned out not to be the case and I was accepted without any difficulty. The unit rates were lower for both gas and electricity, and I worked out that switching would cost nearly a couple of hundred pounds less with Octopus than with EonNext.
I joined Octopus's scheme to save electricity when the National Grid asked for it, and I've had some rebate from that scheme.
Octopus also have what they call a "Wheel of Fortune" which you can spin every month to win up to £512 rebate. Needless to say, the default is £0, but it's fun to do and there's always a chance of winning the top rebate.
The other thing I like about Octopus is that they make it easier than some energy companies to see what their actual tariffs are so that you can compare like-with-like on the unit rate, and so get an accurate picture of whether you will save money or not.
So if anyone wants to change energy companies, I can recommend Octopus (at least for domestic supplies).
Other people's experiences of Octopus or other energy companies welcome
