Don't like it. Anything that requires an extra unnecessary step is failure. With the old system you merely glanced at the names. It was interesting to see who liked the comment. The numbers didn't particularly matter, unless it was an avalanche.
I've seen this before on other sites I post on. golfwrx.com uses it. They also give you a running tally atop the page near your user name on number of likes to your posts. Here's that replaced by reputation comments, whatever they are.
I've never given positive or negative reputation on any site because I don't believe in it. But I have used the "Like" button frequently. Now, with a mere tally and not the name below, there doesn't seem to be any reason to click.