It took about 45 minutes to kick in and the rush lasted for about 30 minutes, but I kept on going for about three hours. I did double-drop and I found the rush to be quite warm and sociable, but they weren't very dance-friendly. All in all I found them to be quite fun (espicially if you have some good weed!) and I give them a aveage :) (not a super smiley though).