Rated 1 out of 5 stars
It indicated that it was working - the little icon "dusted" and showed a count of styles analyzed. I looked at the results and found plenty of "unused selector" entries.
So I visited every page of the web application I'm working on with it. It took 2 whole days.
At the end, I was shocked to discover that there was no data. It claimed NONE of the selectors it analysed in any of the stylesheets were used (a quick glance at any of the pages was enough to prove this false).
It gave every indication that it was working, the whole time, and no warning that it had failed until the very end.
Can't believe the deception and the resulting time wasted.
Avoid at all costs.