This software teaches you how the actual GMAT test will look and feel like. Taking both practice exams is essential to getting a good score on the GMAT. This is great software to time yourself, and get a feel for where you are and where you need to be.
It doesn't allow you to resize the screen which was annoying, but it turned out to be a good thing because you can't resize the screen on the actual test.
I would have liked the practice questions to be broken down into more specific categories so that I could see me weakest areas by subsets.
Sometimes it was lagging after submitting a question, this shaved valuable seconds off my allotted time.
It's very proprietary, and so adding extra exam packs and questions is difficult and complicated.
Opening the software from the desktop was often buggy, and I would have to shut it down and restart it.
With reading comprehension questions, and integrated reasoning questions, the timer doesn't accurately reflect how much time was spent on the whole set of questions.
The software does a very poor job with the "review" feature for reviewing your incorrect answers. You cannot review questions by section, and you cannot select and review individual incorrect answers. Your only option is "review all" or "review incorrect," and in each case you have to start with the first one and click your way through. This was very time consuming, and it cut down on my overall study time/productivity.
Overall it's very expensive to purchase add-ons, and I believe they make it this way because they know people are afraid of performing poorly and are willing to shell out the money.
I used this to study for the GMAT. I also bought extra practice exams to add on to the software. Additionally, I used other study sources such as Magoosh, Prep4GMAT, the official 2015 GMAT Study Guide.