If you have the money, go for it and you will find out. It is also very individual.
I tried a lot of hyped products of this board, like Alphamax XT, M-Test, FD2, Virtus, etc. and well, either I have expectations that are too high, I am not responding to it or things are overhyped.
FD2 gave me more endurance, but seriously I have not felt a particular difference with Epi-Plex. But in general, I had not a lot of success with epicatechin. Maybe not responding to it.
Yes, endurance gets a little bit better, but for the price, just not worth it