The positions almost never work. I place a text-box in one corner and it starts typing text in another corner.

Problematic capture: unless I want to use Diigo or Google, there are no other options because the Clipboard almost always fails.

Always full of bugs. Currently when I type captions, they are blank, and will only appear after I've finished. And then I realise it has run over and have to delete and repeat everything.

And probably my least favourite - all the typos and grammar errors. If you're making an add-on for English-speaking countries, get somebody to check your typos, otherwise it just makes you look extremely unprofessional.