I tried it once, did nothing for me, didn't try it again. I agree that it can be used responsibly, however one of my friends who did it sparingly ended up with

I tried it once, did nothing for me, didn't try it again. I agree that it can be used responsibly, however one of my friends who did it sparingly ended up with a sinus infection that travelled to the brain, requiring brain surgery, which he is still dealing with the effects of many years later (doctors said it was most likely from cocaine use).