I had been with BT for the past few years, and although I didn't have any problems, I wanted a static IP, and to lower my bill if possible, after doing my research I decided to go with iDNET and am so glad I did.
The switchover went very smoothly with no issues, and everything has been great, I can log into my account and see any upcoming engineering work, among many other things, have a static IP, lower monthly cost, i'm not tied into a contract, and can use my own router.
It's all wins in my book and I highly recomend you give a look at iDNET if you're thinking of switching provider.
Time With Provider: 5 Months
Package Name: FTTC 80/20 Unlimited