Its true Able that is cant discriminate between say candida and beneficial bacteria which is why its important to take probiotics too.
I got mine from sota online for about £120. its expensive but if it works it works.
It was a few days before i noticed an improvement but i had a die off for about 5 days, there are other things they suggest using such as colloidial silver which you can make yourself with the zapper using the rods you get with it.
my partner also made me a zapper that you use directly over your internal organs. http://www.bobbeck.com/