Understanding the 'Voting on Comments' feature

This feature enables users to promote and demote comments:

Things to note around this feature:

• It allows one vote per user per comment - just like ideas.
• Users cannot remove your vote. 
• Clear Opinion is also not available at this time.
• An administrator can specify the points for promote comment and demote comment in the user reputation section of setup. (Initiative Setup --> Users tab--> Reputation)
• End-users will be able to sort the comments by Newest, Oldest, Highest Rank and Lowest Rank.