TL;DR:

There is no controversy of any kind. They are engaged in a decades-long ongoing squabble with Nestle’s kit kat regarding 4 finger bars, nothing else.

I want to try them even though they probably taste 95% the same as KitKat. They’re a reason they can’t market them to regions where KitKats are sold, and the article covers this. (It’s because it’s literally the same thing.)