A new resource that might be of interest, from antiterrorlaw.ca:
A bunch of students took C-51 and reviewed all of the committee hearings, and annotated (added text to) the text of the bill. So now you can see most of what people have said about the different sections of the bill. This is based just on what was said in the videos, not the additional written submissions that people might have made (like the Federal Privacy Commissioner, who wasn't allowed to speak but did make a written submission).
The documents in that link are in Word format. Here's a copy in PDF format, for those who don't have Microsoft Office on their computers: