I was using it up until now, but I gave up on it and switched to the standard one.
It's just too damn buggy (and also slow on computers that aren't blazing fast).
Another really annoying thing about it is that it automatically inserts the [URL][/URL] tags into URLs posted here, even if they're inside of other tags (such as [MP3]), and it fucks everything up.
Pretty sad, because it was cool to see the way everything looks in real time, but it just doesn't work well.