At first it hadn’t impress me too much and I thought it was a wrong move to purchase it. I came back last month to give it one more chance and finally I came to the conclusion that this is a must have for finishing a mix - mastering.
The key here is the subtlety. It gives to the material a very nice color while a careful use of the compressor and clipper can improve the song in a way that you end up with a sense that the song has been mastered in a great mastering studio.
Everything is subjective though