About the only issue I have, and it is fairly minor, is that I would like to choose download location more easily, like the old right-click method where the window pops up into the default location or the last download location and you can choose from there rather than having a drop down then choosing to choose, then finding the place you want to download to. This is a relatively minor inconvenience since most of my downloads at a given moment go to the same folder so I download to a default folder in my download folder then transfer the entire session's worth to their final destination when my downloading session is finished.

Other than that, it is easy to use and works well on most sites I have tried it on (mostly educational sites offering MOOCs and other such sites). I use a specific YouTube downloader for YT videos.