As with most supplements (and even some prescribed medications) it takes a period of time (varies by person) before the ALA "kicks in," so unless one is committed to allowing for that, of course it's not unusual to declare that the ALA, or any other supplement, is ineffective...
ALA is not a panacea, definitely not a "miracle" pill. But it CAN and DOES bring levels of relief. Beats taking gabapentin and other drugs that so many of us are unable to deal with the side effects.