I've taken one practice exam and the questions are like real exam questions, not the ones that you could find somewhere else. Not easy to understand and makes you think about them carefully.
But the applications are far from the needs. After taking practice exams, eventually I've wanted to review the questions but no review option is available. After finishing the exams, you can't see which questions you've made mistakes and take notes.
So, be prepared for this and before finishing, take notes by showing answers after clicking each question's Next button.