personally, and i know many people will share this opinion with me, i LOVE my 510. its been more faithful than a part of my body id not like to mention. i can smack it around, throw it on the ground, vape it and at the end of the day, it'll work perfectly! most of the guys that have been vaping for a while probably have a battery mod ecig they use at home, and something for at work or wherever, so you may end up getting many different types of answers.
Just my $0.02
Drew