these are the best thing since sliced bread, except for my new Taylor that is. but anyway, I always liked the herco's for humidity, using hygrometers, I dialed in a system for them to use with my Les, and an acoustic; one keeps a Les at 50% and it takes 2 to keep an acoustic at 50%. they are great little products and I still am using one with the Les, however when I bought the 324, I also ordered this kit. I did not humidify it first per the instructions, this may not work for everyone, but for me, they are still nice and squishy some 3 months later, i love these for the acoustic, no more refilling and no guesswork, time to retire that ol' hygrometer. probably gonna get another for the Les too. that is also a tip for everyone, even though it takes less water to keep them at the right level, electric guitars need humidity just as an acoustic does, and they want water, not oil of any type, never oil, no, no, no. the effects of dryness do not occur with electrics as quickly as do acoustics, but they can still be damaging, particularly with the frets and board, try it, your guitar will thank you.