Word, I was about to say this as well.  Trips last only about 15 to 20 minutes and not everyone trips.  I just get super calm and kind of melt into wherever I am for the time.  Last time it was pine needles that was pretty cool.  Make sure you can be in a quiet space while you trip.  ITs not a party drug, at all.  other than that, its kind of a waste of money, considering lucy is like 5 bucks a hit and that makes you trip for hours.
If it is weak, like 5x, smoke like half a vial and you should feel effects, otherwise 2 or 3 good sized rips should do you in.