Hey this is such a useful little EQ, it really gives you an idea what sound is where in the mix when you increase or decrease a certain frequency.
The really nice thing is it is so intuitive and easy to use. Which means it's a time saver over other EQs who display their information in a relative way.
Merely by holding down the mouse button and dragging it across the screen you can se the entire EQ shape. Clicking each individual parameter quickly moves the level to your pointer.
If you are just getting into mastering or mixing this is a must have EQ. Just using it will teach you a lot about what EQ is all about.
I've never been a fan of overdone GUIs, because they generally subtract from the understanding of the plug in. Too often developers will try to make up for something lacking in the plug by making it look real neat. This plug is very useful, and has a nice simple GUI, which is one reason it is so easy to use.
We're all familiar with the typical EQ with 5-6 or 7 levels to adust the overall sound. This is a version of that on steroids. The added flexibility is what makes it so useful in understanding the underlying dynamics of any production ;)