Definately let me know how it works for you. Right now I don't worry much about running out of juice, but I have been home most of the day so I'm really worried about having power on the go, I am planning on picking up some extra batteries as well. I'm not getting much of a throat hit, but I am blaming that on the lousey chineese juice I got with my 401, the carts that came with the 510 seem better but not by much. I have ordered some Johnson Creek juice about a week ago, but they seem pretty backed up at the moment so i think I will have to keep vaping this stuff for a week or so. I have been thinking about getting 510 for my dad too, he has been smoking for 40 some years and I think if I can get the right e-cig, juice combination I can get him to switch. I think it would be a heck of a lot better, I've only been doing it about two weeks and I have almost eleminated my dependancey on analogs.