Fitted to my H B big 90 which is a Gretsch look alike, a bit tricky soldering the wires to the original but this is due to the fact that It's a semi acoustic guitar so no plates to get at the wiring.
Slightly smaller that the original pick ups as the are Gibson type and I expected this.
Had to put screws so it fitted to the centre block but you cannot tell when the pick up cover is fitted. Haven't used it in anger yet, but sounds good.