I've only seen one person use it and he had to refill the water bottle once a day. Said it worked great for him. IMO- it seems overpriced if I have to refill it every day. But it depends on relative humidity I supose. Not sure if the zoomed hygro/thermostat is any good but the proper herpstat would definitely be worth the price.
There was also someone who just did a fogger converstion to a humidifier, if I find it I'll post the link to the thread.
Thread: http://ball-pythons.net/forums/showt...e-Fogger-Redux
Herpstat:
http://spyderrobotics.com/home/products.html