I passed Part 4 yesterday and just wanted to share that IIA learning system is way much better than Gleim for the purpose of passing the exam.
The real exam questions are very similar to what IIA learning system practice questions and all the knowledge points are covered under the book. There`s 5 questions which are exactly same as the ones in learning system.
If my primary studying material was Gleim, I wouldn`t have passed, as the way that Gleim questions are presented are outstandingly different from real exam questions. But I can say so for Part 4 only though as I used other material for Part 1&2.