Fundamentally, it adds an element of control to your playing level. It will bring the quieter parts up and the louder parts down. A great tube amp when driven into its sweet spot will do this, a compressor can bring you that control but a great compressor will give you that feel as well. Many budget compressors give you the squash and squeeze of a driven amp, but you tend to lose all of your playing dynamics, all of your expression. The Ego Compressor will take that element of squash and squeeze, but will allow you to be able to control the effect so that your playing can shine through. It has been said before that the mark of a great compressor is that you can forget you have it on. The blend is a dry mix, that sweeps between a fully effected signal to zero effect across the sweep of the pot. There will be a point in that sweep that allows you all the compression you need to even out your playing, increase your sustain (if you want it) but without any detraction from you playing attack and feel.