Cliffe,
I'm at OATS at present doing phase 2 ground school, and regardless of what anybody says subsequently regarding OATS marketing/ aircraft availability etc, I can say that the ground instructors are superb!
I am aware before anybody says it that I cant compare them to anybody else as I havent been taught anywhere else, I'm just telling you how I see it.
Even when you consider that the ground school at OATS is perhaps a couple of thousand over everyone else I still believe I am getting value for money.
Good luck in your choice, you can do worse than choose OATS
TBL