My calls to Australia showing up as Christmas Island.
Calls to an 01 number showing up as to Vodafone
Them not putting the UAN on the bill so you can't switch
Hand't opened up the 15XX number range so I couldn't vote in You're a Star (tragic!)
Also they're not as good value as they used to be because the full line rental increase is passed through (unlike other operators - including eircom if you're on a bundle)