I've been vaping for almost a year and I heard about NT so with all the reviews I had to try them. They are absolutely exactly how described.. BUT... I vape CLS for a few minutes and my tongue gets all tingly and I get a metallic taste in my mouth. Has anyone else had this issue??? using on a vision spinner at 3.8 v. on a vivi nova 2.8 ohm coil. I have also used it on a mvp with a shorty 1.7 ohm carty at 3.7 volts with the same effect.