Had problems at first, but the developer has corrected them very quickly.
Antihack works very fine, a lot of time i searched antihack like NSE. How i know at the moment method that use NSE is the best. Nowhere I have not seen such methods.
Sometimes CPU is loaded highly, but I did not understand because of what, because it's not always the case.
Currently antihak loads slowly, 7-8 seconds, but as I understand the developer is preparing a new version, the new version has promised 1-2 seconds loading time.
Basically it's good product. NightWish is good man, he helping me in any questions that doesn't relate to antihack system.
Thanks a lot for the best security for my server!!!