What do you mean? You just press quote and it appears in the text editor?
It's fine if you're simply quoting the entire text, but when you start to edit it, to remove paragraphs etc, it all starts to get very wonky with sections being removed for no good reason, the entire quote disappearing or coming out in a completely different layout altogether. I even have to be careful as to whether I use Backspace or Delete as well, as it really doesn't seem to like them used in certain ways.
Not the only forum I've come across where it's an issue, and it's certainly not major, but it can be pretty frustrating on occasion.