I just took it today. There is only one version so make sure you know what you're doing before you take it (because if you go to take it again it will be the same exact questions!). It is really helpful because it's timed and you get a complete evaluation of what topics you need to work on. It's only three hours (shorter than the real one), but it's a good change of pace when you're used to taking tests out of study books...plus it's free! I did find that I scored lower on it than all of the other practice tests I've taken, but maybe they just want you to buy one of their prep packages! Good luck!