definitely challenged with vaping late into the night...also at work now that i can vape indoors (not long elevator rides and 10-15 minute breaks for a cig) i can get really over amped. I've tried some lower nic juice but haven't liked the hit...i'm ordering some menthol crystals and concentrate so i can amp up the flavor and turn down the nicotine but i am still struggling with this--i was a newport smoker and loved the jolt of a strong cigarette and rarely smoked at home (due to family members and kids) hence i tailed off naturally at night now i have no social limit and am having to learn what i actually like--kind of interesting but i'm breathing easier and feeling better even with 5 hours or less sleep.