Better than 21 weeks with the CFX and I don't love it. Good points are that the battery charge lasts a usefully long time and the heating chamber holds a good quantity of weed. Bad points are cleaning - getting harder and harder to keep the mouthpiece usable. You need isopropyl to clean it (after disassembly), but the plastic parts must be getting pitted or rough, because they get dirtier faster after each cleaning. Replacing mouthpieces will be an ongoing issue. At $15/per and probably one every two weeks, for optimal function, not the end of the world, but a pain. The digital display also has some annoying glitches, biggest is that if the device shuts down on time, the next time you start it manually, it shuts down, so you start it again.
My new favorite portable vape is the Arizer Solo II that just arrived. Better electronics than the original Solos I have and also has the "dimples" in the heating chamber from the Air. These dimples really improve airflow.
The Air worked great when I was quitting cigarettes with the help of a box mod vaporizer. It used the same 18650 batteries as the air. Kept a charger going with multiple batteries, carried charged batteries with me and used them in both devices. Nicotine vaping ran its course. After I quit, the Air batteries became a PITA - not enough charge to get through multiple sessions and not worth the maintenance effort by itself. The Air is a very compact device, so useful for that.
Solo II would be perfect if they added a USB port for slow charging in addition to the proprietary one they use, like the CFX does. Found that handy.
Biggest factor for me is the vapor path the Arizer products use. Stainless steel and glass. Nothing sticks to the stainless. When the glass gets dirty, into isopropyl for cleaning. Glass stems are cheap and having a few in rotation is simple.