It's so good and easy to use.

Hey! This is a great add on. You can click on any Video and it's going to download it very fast. 5 star rating if you guys add Playlist Downloader!

very good

Other than a period where Google/Youtube were shutting free download extensions and programs down left and right this one has always been trustworthy and worth the pro price if you're downloading more.

Besides some UI issues, would recommend

I've been using it for years. Every now and then when YouTube changes it's download infrastructure, it takes a few days to a couple of months before it works again. But in general it is very recommendable, does perfectly and easily what it should.

New version is pretty nice. Just wish you could disable the popup window that notifies the download is complete, there's already the built in status widget on the page and Firefox's own download manager popping up at the top. And if we could edit the download options to e.g. remove all the MP4 options so the drop down is shorter would be nice too.