I, too, had high hopes--but should've known better. Followed instructions to a T. But I kept wondering why it needed refilling so frequently--at faster pace than the old-fashioned sponge-types installed in a couple other cases. Finally discovered tonight it had been leaking --from somewhere near the cap. Hoping the damage isn't long-term to my lefty acoustic-elect bass, but there are stains both at the bridge & inside the sound hole. AVOID.