Back when I didn't know any better and left a lot of the choices to the tailors whom I brought clothes in to alter, I had 3 or 4 trousers hemmed at Stitch It, based on the recommendation of some saleswoman at Club Monaco just down the street on Bloor.
Granted, I didn't know any better and so it was partially my fault in that I wasn't firm at all in what I wanted, but all of the trousers were universally hemmed way too short. Completely circumstantial, but the fact that it's located in the basement food court of the Manulife has always made me feel like it's a place that profits from volume, largely benefiting from the sheer mass of people that pour through the area via subway or on their lunch break--with little care or attention paid to the individual.
Incidentally, I had a few of those same trousers brought to Nikos who did his best to correct the mistakes of the past and let them out again the best he could. I've always been happy with Nikos's work, but I am no expert.