If they plan offering this in Ireland, they'll sure have a bit of competition to face here.
For example, the Meteor network charges â‚¬10 for 7.5GB of data on their prepay plan, which I mainly use. If you've a student ID, then it's â‚¬10 for 25GB.
The Three network has recently started competing with fixed line services with 4G data plans up to 250GB. On the other hand, Three already seem to be facing network capacity issues, especially in rural areas.