It is worth the switch to Airtricity if you are interested in saving money, their customer service has improved alot over the last while. If you write to Airtricity and they do not reply to you within 5 working days they will credit your account by €20. The best discounts are to be got from the Airtricity door to door reps, I switched with them which was hassel free and im saving up to 17%. I'v had no problems with them. The trick to saving money with any company is to switch supplier yearly to get the best deals so i will be switching in the next few months to whoever offers me the best deal. I found it was better to switch rather than to stay with the ESB because i had the opportunity to save money for a year and they will offer me a good rate to sign back up with them. Its good healthy competition which was missing for a long time here.