I haven't tried it, but a friend of mine was addicted to it and says that it's fucked up. She was hooked on heroin in the past and kicked it cold turkey, which is a phenomenon on its own, so if she says that meth is a beast, then I definitely believe her and don't want to mess with it.
People love coke, I tried some this weekend, not impressed. It prevents you from getting drunk, which is ok, i guess, but if I'm going to be doing anything, it better be more amazing than that.
When I want a "feeling" I turn to mdma or e. Lots of feelings there, all mostly good, depending on what they are laced with.
Krokodil sound like a hot mess, do what you wish, but that just sounds nasty.