Bought tires form here a couple of times, nothing but good things to say about them. Phone calls answered promptly. E-mails answered in good time. Always up-front & forthcoming with prices and other requested information - no "hiding the ball" with answers like "call me" or "come in for a quote" - I appreciate that. It would be even better if the website had prices, but hardly anyone does that in GTA so I'll give them 5 stars anyway, at least they don't make you fill out the silly online form like most of the bigger chains.
Casual but very courteous environment - seems like a family operation with a real "team" environment. Very accommodating with booking, good installation. Location is far from me but on the plus side the industrial park is a great place to road test the car right away and check for noise or vibrations at speed.
Tires23 is well rated here as well as on many car clubs, forums & RFD, and my experience was consistent with that. Should be on everyone's short list along with Tires1010, Simply Tires & Joy City.