I would say that the Pro is probably not as fiddly as the TM, so I think you could call it more durable. The lid latch on the OG could lose its seal over time, and the cleaning and debowling was messy. These are issues which the Pro addresses.
I have one of the cocobolo stems from Ed. Beautiful work. May put it back in the Knot, which I’ve been using as a daily driver. It’s nice to medicate not obliterate.
Since it’s Bluetooth based, my guess would be that you could connect multiple devices to the app. I lost the app the last time I upgraded my phone. I also have a cheap Android tablet with it installed, but I wish Apple would reconsider this policy.
I've been using the white POM AAF stem with no problems. I might get one of the metal ones, but only because the POM model feels pretty lightweight. Functionally it's fine though.
The OG is a decent vape, but Airvape's CS during the whole pre-order period was pretty bad. They kept blaming the units not shipping on a new reason every few days, and when they finally did ship, the "basket" was so obviously an afterthought. Then on top of that to charge shipping instead of...
Somewhat in agreement, but I wouldn't carry it in a bag or pocket without removing the battery first. There was at least one case of the Zion M burning in a backpack due to there being no way to cut off the battery connections for transport.