We have been with IDNet for at least five years having moved from a Zen broadband package. The reason we moved back then was that our experience with technical support from Zen was very frustrating and almost as if they were trying to do the least possible to help.
Since moving to IDNet we have used their technical support 3 times and each time the support was excellent. Twice the issues were down to BT the other was a configuration issue we had in our router.
Since switching to CityFibre with IDNet about 6 months ago we have had no issues at all and the speed and more importantly stability has been excellent. The CityFibre installers did a great job installing the fibre into our home.