My experience has been not so good. They don't fit well. They don t seal my ear so significant ambient sound leaks in. The electronics are slow. Their website claims they cut the amplification in milliseconds. Well a gunshot sound is measured in milliseconds. The circuitry they use is analogue, and the best it can do is milliseconds. So, it leaks sound, then retains the amplification for the first few miliseseconds of the shot, then turns off. The first few milliseconds is when the shot is the loudest.
After these, I bought good digital hearing protection, and the difference was apparent. The ear seal was good. No ambient sound leaked in. The amplification cut off is microseconds, and is readily noticeable. It's roughly 1000x faster than an analogue circuit. The price was also significantly higher. In this case, I got what I paid for. I threw out the Howard Leights. I shoot a lot, so hearing protection is important to me.