Product review (5 stars): Awesome humidifier, not just for the money, just awesome period.
This thing has one of the best sponges I've seen. It holds a ton of water but does not drip or release it fast enough to condensate. Slips right between the strings of your acoustic, then mount the humidity and temp monitor in the holster and velcro it to your case where you please. In the case of my electric I do the opposite, put my humidifier in the holster and velcro it to the case, then I just rest the monitor elsewhere. Versatile, easy to use, great sponge. If it was slightly more compact it'd be 5 stars.