Has a smooth high end unlike some comp pedals I've used/tried that give more gain than sustain (yes, it happens). The "blend" option is nice to let some unaltered signal pass. Through a few amps I found that these settings are nice for country twang and over all sustain:
Vol - 6 Blend - 8 Sustain - 7
Comes with a sheet for presets that work great. Not as quiet as my Maxon comp, but still works good.