From what I've heard, all driving schools are more or less the same. I'd say to just find the one offering the cheapest price. If you don't have a phonebook handy, just go on
http://www.canada411.ca/ which is basically an online phonebook...
I personally took Ontario Driving School in Windsor. It was $385 I think...easy as heck. I found Driver's Ed to be somewhat useful so it's a good idea to pay attention even though the tests are extremely easy.