Fit for purpose
In my opinion, 80% of the questions are logical and easy to answer. The other 20% however can be tricky due to wording or contextual knowledge (e.g. point violations, road signs, etc.). From my first time opening the app and trying a practice test (79/100) to the day of the exam (multiple scores of mid-90’s - it seems my final score was very much in line with the practice tests.
I think this is a tremendous resource, and I recommend it wholeheartedly.