So overall it's a great thing to have, but it has one big flaw: when pressing "Empty recycler" only comments that are visible on the current page are deleted. This might be okay for blogs with very a little commentary spam amount but on my blog I get far more than just one page per day (more like two or three, sometimes four pages and more). That means that cleaning the recycle bin is very time consuming. I only need to wait two weeks and cleaning the rubbish means half a hundred clicks or so. It's easier to open phpMyAdmin and click TRUNCATE on the table than to go through this procedure.
I won't be disappointed if a click on "Empty recycler" would really empty that thing.