How to choose the best electricity retailer in Singapore?

Choosing the best electricity retailer in Singapore is not a tedious task as there are only few recognized power supply companies. While choosing the best electricity supplier, consider the following
1. Stability in the industry
2. Cost-effective plans
3. Proper customer support
4. Service sustainability
When I was doing research, I found iSwitch to be the best and I opted for them as my power supplier.