ive never responded to monohydrate, but its cheap and worth a shot.
first time i tried con-cret was also the first time i tried no shotgun. i thought it was amazing and all my lifts went up at least a little... the 2nd time i tried it was with the newer version of assault (which also has concret in it) and i did it for at least 2 weeks longer than the first time with NO results whatsoever. my conclusion with that whole endeavor is that (at least FOR ME PERSONALLY) no shotgun is probably awesome, and concrete sucks. haha
i know people will disagree with me, any maybe its just some kind of placebo effect, haha, but krealkalyn is the only type of creatine ive taken and seen gains each time (albeit modest gains).
never tried nitrate, kind of scares me, although i havent done much research on it, so the 'danger' may just be BS