Since I don't read French, especially old French handwriting, I didn't find the Family Search collection to be of much value. It took a while, but I've started using it. At first, I would just look for the dates provided in other citations that did not have the image or came from paid sites. Those training wheels really helped me get started. Now I'm able to find record images by browsing through approximate dates.
The records both confirm (or dispute) collected works by others, and often provide new information (God Parents, Witnesses, etc)
I'm posting this to encourage others to use the collection. Many would be surprised that the can find the records they are looking for, and download them for free. (Linking them to the FS Profile, and WikiTree profile is recommended)
For great advice on how to get started see
Quebec, Catholic Parish Registers Getting Started
For help with the French
French Genealogical Word List
To Search the records
Quebec, Catholic Parish Registers
Clicking the Browse link brings up the Parishes, most are organized into time period collections.
It helps if you know months in French.
for more on using the collection and other resources see