My Npro served the purpose of getting me interested, but wasn't satisfying enough to use it for more than a couple of days. If I pick it up and take a drag I might get one satisfying hit off of it, but I'd have to sit it down for an hour to get another. I also ordered some refill liquid.
I was not thrilled with the prefilled cartridge, but after awhile I refilled it with some of the menthol liquid I bought and it was great. I thought if that was what made all the difference I'd try it in my Npro. I couldn't refill the cartridge very easily so I did the 'dripping' thing and it was even better. It makes kind of a sizzling sound when I inhale on it, but doesn't seem to affect the performance.
The 510 will be best for me to take to work. I was wondering why the battery on the Npro never lasted past one break and then I read on here that noise can activate the automatic ones, and I work in a factory.
I was not thrilled with the prefilled cartridge, but after awhile I refilled it with some of the menthol liquid I bought and it was great. I thought if that was what made all the difference I'd try it in my Npro. I couldn't refill the cartridge very easily so I did the 'dripping' thing and it was even better. It makes kind of a sizzling sound when I inhale on it, but doesn't seem to affect the performance.
The 510 will be best for me to take to work. I was wondering why the battery on the Npro never lasted past one break and then I read on here that noise can activate the automatic ones, and I work in a factory.