Although I have never been a great user of PW supplements, I was pleasantly surprised with the "focus" that this seemed to deliver.
Normally, these products are full of beta-alanine which give the usual tingling feeling and I often think that many people judge these products based on that.
This product does not contain beta-alanine and yet still manages to deliver something from ingredients that I've never heard of. I will probably use it again, which I have never done with any other PW that I have tried.