I have been using Veritas for a couple of years. It is harder than the real test and harder than the OG. It is good to have harder questions, but sometimes it puts additional preassure over your preparation for the exam. Plus you might be learning things that you shouldn´t, in the sense that you might be checking your mistakes on hard questions when you should be studying basic topics to improve the basics of quant and verbal section. The other thing about Veritas is that they only have 7 tests. So if you took all of them, you would have more options even if you buy again. It could be a good product if you already have a good grasp of the basics and want to practice around the 700 level.