Yeah, I use their app on android and it's pretty bad. There's currently a bug that seems to get fixed and then reappear where if someone responds to your comment, you get an alert and when you click on the alert it takes you to the comment, but if the comment is too nested, it just takes you to the top of the thread. This makes responding to a comment in any thread with over 100 comments near impossible. Because of that, I'm using the web app currently and it's really annoying to be constantly pushed back toward a broken app.