A lot of people are generally interested in these kinds of Game trainers, it is the ability to do more throughout.
Being able to get more things done throughout the game is a major advantage because it offers you the ability to get more out of each and every play session.
This is especially true for an MMO which is typically spent doing a lot of ‘grinding.’ Being able to take more of the grind out of the game is going to allow you to reach the levels that you need to in order to unlock more of the game.