Best thing i used was the PPL Questions and answers simplifier. I found it far more nearer the exam questions than the Confuser! I will admit i didnt use it for Airlaw but did for Human Per and Aircraft gen and was more or less word for word the same as the exams..
The confuser i found (for me anyway) was only about 25% like the real exam
and had i just flicked through the Thom or Pratt book and used the confuser i would have failed badly
For my met exam the confuser was no help apart from helping you read and understand Tafs and Metars..(And no the Tafs and Metars are far different than the confuser!!..) I cant remember one question that i had seen in the confuser in that exam and even came across 3 questions that the Met study book at the time didnt have any reference to????
I did use Airquiz and its ok but didnt really find it that much use (Again just me)!!!
Take your time read the books well and take lots of revision notes or do a groundschool (After you have read the books!!!!) that you can take the exam after a structured full days study my friend did this and found it far more enjoyable and he remembered the information far better
Good luck Stay safe