I've used it a lot in high school and now college, it's the DOC for many of my friends. When taken orally at normal dose, you won't notice much, but in slightly higher oral doses, or when snorted, there is noticeable heightened energy/focus/interest in surroundings. I've heard a lot of people say it "sucks" compared to cocaine or meth because it's not as euphoric, but it's also a lot less damaging to your brain than say, meth, because after you use it the synapses dump all the endorphins back into your brain instead of just flushing them out like methamphetamine. but i've always enjoyed snorting a few pills and smoking some weed after, it's a great combination for some of us.