I have had several friends that I have started out on a 510 who smoked light cigarettes and they loved it... At first... then one stoped vaping and went back to cigarettes and the other stopped altogether... For a while... I got them both on a 901 and the one guy loves the 0mg/ml juice I make for him and the other loves his 15 mg/ml.. Difference smoother hit more flavor..not quite as warm as a 510 ... But still tons of vapor and a nice smooth TH just my two cents worth.. I use a 510 unless I have just ate then I like my 901 but this could help
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