"Did the add-on work as you expected it to?"
Most of the time this extension works flawlessly. Every now and then it may have a bug, but it doesn't take long for it to be fixed.

"What features did you like or dislike?"
There is nothing to dislike. It is so simple to use, if you cannot work it out you should not be using computers.

"Was it useful?"
Absolutely. I use this addon to download many videos from the channels I follow on YouTube. In the age of internet censorship having the ability to backup web content is vital. You cannot trust social media corporations to do it for you.

"Will you continue to use this add-on?
Yes, I have been using it for the last 6 months as a free service and just today I started to donate. You should really think about how much time people spend on making these addons and consider donating.

If you constantly use free services and never donate, go to work tomorrow and tell your boss not to bother paying you.