The energy market in Holland is commercial since a couple of years. Which means you can choose the comapany you want to deliver you gas and energy. While there is no difference of quality the price and service determine your choise. Could have done it years ago but anyway did it now. Yields me hundreds of euros per year if everything goes well. And is seems to be easier than changing you mobile provider.
Main Energy it is for me for the next year. Did choose that via one of those compare sites that does the maths for you. Will see if everything goes well.
The funny thing of gaslicht.com is that it is of that Dutch guy, Ben Woldring, who became millionaire when he was 12 or so with a compare site of internet providers. Later on he started mobile comparison and so on.