I'm not sure to what extent hiring managers have to interact with the software that powers the co-op process (Jobmine), but as a student who has used it to secure 5 terms of work, Jobmine is definitely up there on my list of the worst designed/most frustrating pieces of software to use. Jobs for CS students are good and plentiful, so its still worth sludging through the system. Looking forward to the replacement, if it ever comes (startup idea?)! (http://www.bulletin.uwaterloo.ca/2011/feb/25fr.html)
For students it's easy to criticize Jobmine as users of it. But given the even worse (or in many cases, non-existent) co-op application systems at other schools, Jobmine is light years better.
I remember working with some Waterloo alumni from the 80s/90s and they spoke of the chaos of the application and ranking process when everything was done on paper. I personally can't even fanthom how UW managed to do any of this (although obviously there were less than half the number of students then to what we have today).
