Can anyone tell me who's practice test software they use. Or which one you have had the most success with?
Kaplan Self Test
I recommend MeasureUp personally. It is very difficult, in fact more difficult than the actual Microsoft exam. The questions and answers really make you think. They have a pass guarantee policy but you must prove that you follow their guidelines. I believe if you can pass MeasureUp 2 times consecutively at 90% they guarantee you pass or money back.
I have tried others and found they were too easy and did not prepare you well.