Have bought some, but so far have only used it once (haven't had the gecko's for very long) for cleaning the tank. Seem to be quite a few on here who have used it long term, hopefully they chime in!
i have been using it for the last year it seems to work fine. there is another product called chlorhexidine that a lot of breeders use you can buy it by the gallon on - The Bean Farm for $30
I have used the Zoo Med Wipeout in the past. It works well if you only need it for a couple tanks. If your breeding though I use bleach. It's cheap and just as effective. 1 tablespoon bleach to 1 gallon water. Chlorhexidine works very well too. But you can get it for about $20 cheaper shipped on Amazon for a gallon.