Yet to try it but I will

The editor UI on Android is pretty terrible. Most of all, why is the button for adding new sections missing? This already makes it borderline unusable. But it is also impossible to delete lines (if you press backspace on an empty line, simply nothing happens) and selecting anything is extremely janky. The responsive editor design (where every line is a DOM element in its own right) may make sense on Desktop, but on Android it only causes problems. Please fix.

Не работает автодобор. Не понимает в классах знак "+".

The addon is great to change the appearance of a website, however, it seems it canNOT be used with VK. If either Stylus or Stylish (it doesn't matter, I tried) is on, VK page elements, be it the messenger or literally any other page, either move up and away from the view, or the browser shows the page with no CSS or HTML formatting active, just plain text. This only happens on Firefox, too, on all Chromium-based browsers, VK works fine with both Stylish and Stylus. It also doesn't matter if a VK-specific style is active or not, the pages break even with no styles active. This addon breaks only VK pages, all other websites work as they should.

Stylish site never loads. Just a spinning color wheel forever. It's not Stylus's fault, but since it's an integral piece of what this add on does, it's just not that useful anymore.

感觉还行，就是不会用

when i want to open editor in a new window-it does not show !!! I only get the name in the taskbar but with no window and no style...please fix it or help me .

Sadly, Stylus (without having any styles loaded) messed up my zimbra-webmail and I cannot use it anymore.
Other than that I was generally happy with it. Silently pushing DOM-manipulation is not appreciated, however.