Can't really say anything negative about the Air except for the inconsistencies in airflow I sometimes must deal with (depending on circumstances, sometimes I have almost no airflow at all, even with backing out the stem a few mm). I'm aware of pvhes, but they are currently out of my pricerange and I wouldn't want to inhibit vapor density.
I've had my Air since May of 2015, and it's running as if I bought it yesterday. Such a well built, reliable vape.
One of my problems, and I'm not sure if it's an issue with all portables, or just the ones I tried (mflb, flowermate, Air), is I don't feel I can medicate well enough. I love the vapor I get with the Air, I love the flavor, I love how it feels like I'm smoking a fat joint for 10 minutes but enjoying all the smooth vapor...but once I tried some heavy hitting desktop vapes, I feel it just can't keep up. Don't get me wrong, if I were to smoke instead of hit my Air, I would never get as medicated as I can with my Air. Comparing to combustion isn't what I'm after though...it just can't compare to my Nano or LSV. I would need to vape for like 20 minutes straight to get to where I could in a few huge hits from my LSV.
I love everything about the Air except for the fact that I can't medicate as well as I would like to. It's still enough to completely turn me off of combustion though, and that, in the end, is the exact exact exact reason I purchased this portable. I had a mflb and a Nano...but in order to quit combustion on the go, I needed something more fun than the mflb, and fun enough to turn me off from pipes and joints forever (and it did...from day one).
If I didn't have these desktop vapes, I would be absolutely in love with what the Air could do for me. Quick charging, awesome battery life from what I'm used to (4 sessions on the go is amazing compared to having to use 8 batteries for 1 mflb sesh. Yes....I was an OG with horrible batteries).
I just need a portable that can hit me as hard as my Nano or my LSV...Maybe I just require a Mighty or a GH or Zion...
Whenever I feel like a real nice, laid back chill sesh, I whip out the Air every time. It's easier to use than any desktop vape requiring stirring or handling of multiple tools. When making breakfast with the house to myself, it's amazing to be able to just pop on a stem and walk around the kitchen with the Air. For what it is, and for what I got it for, it performs absolutely flawlessly.
My concerns for this vape are a unique desire to achieve greater potential, so it's more of a problem with me than with the vape itself.
Either way, long live Arizer. Other vapes may beat it in power, but Arizer will always come through with reliable builds. I never have any fears when using this vape, other than draining the battery too far (I will never turn the vape on if RED, even if able to pull out another sesh), but I'll sesh back to back to back to back if I want, and never worry about the unit receiving some sort of damage. That feeling of comfort is enough to keep the Air!