I travel frequently for work and I can say this is one of the best Apple service centres in North America. My keyboard was replaced in no time, and my MacBook Pro was returned to me like new. Excellent service and extremely friendly staff, 5/5.
Mac Computing couldnt fix my Mac mini fan problem and they broke the fan connector. They billed me for 85 $CAN for a fake diagnostic, they told me that they need a special tool that they dont have. I then visited one of their competitors, another repair shop for Macs in Montreal. My Mac mini fixed and working great for 80$CAN. Make yourself conclusion but from my experience Mac Computing do not deserve even the one star I had to give them.