1. Something about not having an internet connection..... So far a waste of my time and effort.Very Good amount of open, free content.
2. NO ADS!It's really helpful and i just pass my exam .I just started using this app to study for my exam and so far I really like it it .Best app.
3. I hope I am studying the right answers.Can't log in after clicking on link.
4. So far, I have experienced 2 mistakes (which I have the screenshots of).
5. I am a bit weary of the answers.
6. Overall it's useful.