So I've started looking at other things to improve/change

I live 'out in the sticks', with no local homebrewer shops so delivery can be a significant part of my per batch costs.
To help with that, I'm thinking of maybe getting a 25kg bag of Maris Otter, and a Corona mil, so I only have to pay delivery once.
Anybody here use A Corona mill, what's your experience of them? They seem much cheaper than a roller mill.