I've done it. it feels great. this guy gives the best description. i think it can be pretty addictive since it was such a great experience
first, I felt nothing except a slight burning sensation in my nose. Then, as I went to the kitchen to get a drink, it occurred to me how much I loved my friend Rhiannon. I came back in and sat down on the chair and stared at her. “You OK?” she asked. “I am absolutely fine,” I replied, smiling widely. “I really love you.” “It’s working then,” she replied sardonically. A few minutes later, we were all sitting round in a euphoric haze, smiling benignly but with an incomprehensible, overwhelming desire to dance. It was nearly impossible to keep still.
Then things became very vivid and real and everything everyone said suddenly became very important. Before we knew it we were piling into a cab, laughing and giggling uncontrollably and going to a club. The effects lasted for about another two hours. Then, as suddenly as they had appeared, they vanished. I was left standing in the club with a pounding headache, wondering what on earth had possessed me to go out. I can now understand why people re-dose as soon as the effects wear off because the contrast between being intoxicated and not is sharp and sudden.