I taught at Brampton for 2 years. I consider them to be innovative and one of the more technologically advanced flight centres. Their modular ground school system is unique. The sim is state-of-the-art. Instructors are the most important link. Talk to the CFI and ask for the best instructor. They will be very, very, very busy (the best ones always are).
The circuit can get very busy in the summer. Early, early morning or late day works best. Aircraft are kept in top shape.
I also taught at Waterloo. Great airport. Good club. I can still recommend career instructors who are great. Terribly jammed in the summer with the Air Cadet contracts. Tower on the field.