It didn't sting my lips and it wasn't harsh. It was BUNK and took 3 or 4 hits out of my glass pipe to get high. Then it wasn't all the powerful of a high. Didn't last long - I was searching for my pipe again in 45 minutes. I don't have a high tolerance either. I smoke about 1g a week. If it had any potency at all I should have been blasted for at least 2hrs before even thinking about hitting the pipe again. It should not have taken 3 or 4 hits (basically a whole bowl) to get high either. Good thing it was free. I won't be purchasing any of that anytime soon.