Honestly for the price they are phenomenal. I’ll probably be getting them again. Let’s hope the cheap coils I got off wish will be good too. If they weren’t for a smok tank I wouldn’t have but smok is a Chinese company and the coils are coming from China. Don’t care if they are authentic just that they work. I paid $3 a pack for coils that are $27 locally. I think that price difference deserves a shot.