I did my training at the Brampton Flight Centre and I would do it again. The people there are very friendly and professional. They own their own airport and have a well maintained fleet. The restaurant is worth a visit as well
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Tower controlled airports like Hamilton, Oshawa, Kitchener and London are right around the corner.
The point mentioned above with the close proximity to CYYZ is true but doesn't affect initial training. Only IFR training could be affected because one has to expect a few holdings before shooting the approach (CYYZ traffic takes precedence over CNC3 traffic). The VFR training area is just a few miles to the north of the airfield. If I remember it right it's just west of Collingwood.
Try
www.bramfly.com
Cheers