Rather expensive for what they are, but a great way of making your Epiphone visually more stunning. I replaced the standard knobs on about 8 of my Explorers, Flying V's and Les Pauls, and that little extra bling always gives the guitars some extra class, as if they were from a completely different price bracket. No tonal or ergonomic implications; only bad-ass looks! Do not replace again and again, because the plastic to fit on top of the potentiometers will eventually wear out. Also, handle with care if you are replacing the knobs on a push-pull system.