If it weren't for the fact that the location is convenient and the cheapest in the immediate vicinity I definitely wouldn't come back because the customer service is so awful. Take today's excursion, for example: first an employee yelled at me for wasting toner because apparently I wasn't pressing the spine of the book close enough to the glass (the copies were perfectly legible and not at all obscured by toner shadow), then another started talking to me like I was stupid and at fault because the machine jammed. All of this happened while an errant child, presumably one of theirs, insisted on blowing a screeching whistle for at least 10 minutes before I left. Also, while I've never bothered to check if I've been overcharged, the last two times I've been there customers have challenged their totals. In one case the customer was charged 25 cents for 3 copies (remember, this is the Three Cent Copy Centre!). When she pressed the employees about how such a basic mistake could happen they started blaming each other until one of them left, and then with an unprecedented level of consensus they blamed it on that employee.
There's another copy place just a bit south, which is more expensive but offers a much more pleasant experience overall.