What's good, in terms of getting the most potency from the herb? That's number 1. It has to be dry herb, portable. I would like something more durable -had to replace the first APX after a few months, and second unit's battery seems to be wearing out. It gets used pretty much daily, usually a few times a day. I'd be ridiculous if I wasn't willing to pay more than the $45 that I paid for the APX. Also...hello, all New here, and still somewhat new to vaping.