I tried this a few months back and I wanted to give some feedback on it.
When I tried this I was trying to compare it to Scivation's Neurostim+C caps, my own personal nootropic stacks, and by its own merit. I got the Pink Lemonade flavor. Pretty tangy and I bet some of it could be contributed to the amount of ALCAR in it.
Overall I think its a great product for preworkout energy if you are heavy into stimulants. In my personal experience I've used products like this and similar preworkout to deliver a clean energy and focus to my workout. It defintely affects your mind/muscle connection. This isn't a replacement for CEE products or anything like that, just something for that extra kick.
Most of the times when I used it I used it for workouts, but I've tried it a few times during days where I had to concentrate on something for a long time (studying, figuring out something, mundane tasks, etc.). Next time I buy it I will probably try it out with piracetam as I've heard that's a good stack for mental focus, clarity, etc.
Comparing this to other products on the market it is worth your buy. This actually has a higher amount of ingredients in it than neurostim+c. Only thing is with nootropic products is that I'd advise cycling them since you can develop a tolerance for them.