Leppy

I have never been big into military sims but saw this mod and it looks ridiculously awesome. Arma 2 is on sale on Amazon right now and I was thinking of picking it up mostly to play this(I would try out Arma again as well). Im thinking I would like it just because they play so differently. So my question is this, if I didnt like Arma is it safe to say I wont like this?

Some of the things I didnt like about Arma 2 was that it felt a little clunky to me(I didnt give it much time so maybe its just a getting use to thing), but the thing that always got me was that everytime I seemed to come around a corner I would get one-shot from someone I have no idea where they are. I dont mind taking my time and playing tactically, because I know this isnt CoD but it seemed hard I redownloaded to free version so maybe ill give it another shot.