well, the pax looks bad ass, but it's a conduction type (from what I've heard) and vape quality reputedly suffers because of it. I've had 3 portables: an iolite, a magic flight, and an arizer solo. The iolite has moving parts, gas jets, etc....mine crapped out in 3 months and never gave great hits. The magic flight is simple, durable, lifetime warranty, and you can easily replace the batteries... first hit is great, after that it's sub-par in IMO. The arizer gives GREAT hits... if you hit it ssssslllloooowwwwlllyyyy. It's my favorite. I did have to swap out the battery after 5 months of extreme usage. That is simple but if you go for the cheap replacement +/- $10 you'll have to do some soldering.