Some people have been complaining about watermarks on videos with this extension, but I haven't seen those, and besides I mainly use it to download music, which it's really good for. It doesn't put extra stuff into the file name that I have to clean up, I can direct the files into different folders, there are a lot of different options in general, and it's relatively fast. It's made downloading music much more convenient for me than when I was using random, buggy, slow youtube-downloader sites- I highly recommend it