Arrived promptly as always from Thomann. Installed yesterday with a set of EMG SA's, easy enough to install and use.
I'm yet to use it in a loud gig or rehearsal situation but so far I'm a bit "meh". It did what it said it would, boosts the mid range, but tbh I find the lack of bottom and top end when on full a little too much and borderline unusable (for my uses anyway). If you keep it between 1 and 5 then it's ok and could be useful for a bit of extra drive on solo's, or to fatten up the sound a bit. Above that and you lose any clarity in your sound and it just gets swamped with mids.
My idea of Presence is associated with the Presence knob on an amp which to my ear gives more clarity, don't expect that with this product, quite the opposite in fact. If that's your want then maybe try the EXG or RPC pots...? I may look at these next.
All in all I don't think I'd buy it again, but that's just my opinion.