Easily my favorite cartridge battery ever. Love the temperature settings and steel covers, very discreet. I get compliments on it all the time!
The only gripe I have is that the keychain loop is effectively useless as it forces the vape to hang upside down, which makes all the oil flow to the top! Have had a few dry hits because of it. Perhaps include one cover with a loop so that it would stay right side up? Just a thought