I use it the ART split/mix for splitting, to push sound to speakers and subwoofers, to be able to control the level for each.
Mix or split, you have to chose one, it doesn't do both at the same time.
Pros:
Very good quality build.
Connections at the back, controls at the front
The knobs have this satisfying feel-good soft resistance, and everything feels very solid.
Small footprint
Cons:
As a passive splitter, you sacrifice some volume, but it fit my purpose well, and I get enough volume for loud music.