Easy to use and very straightforward. Not easy, just like the DMV test which I just took. Comprehensive and detailed. OK, hard, but I was OK with that. The only issue I had was that when I took the final exam, I found that if I was not sure of the answer, when I went back to the material, I found all of my previous answers had been erased and had to start over. I did that once and then because I did not want to go throught that again, did not go back. I did pass, but just barely. Maybe I did something wrong, but if that is not the way it works, then some explanation of how to go back to review material and not lose you place in the exam would be helpful. Thanks, R