Needed something that could mix the signals from USB interface output, record player and 3.5inch stereo jack to a single pair of speakers. Works perferctly for the this purpose. RCA jacks could be detriment for some but are fine in my case (also, RCA's will keep the box smaller due to their size).
My biggest con is the weight of the cables dragging the mixer. Due due that, be careful on surface's edge or somehow fix the unit to surface.