The Kanger Subox mini is an easy to use kit that has an included RBA (rebuildable base) that makes a good introduction to rebuilding to newer vapers.
The Augvape Narada is a very simple to use, fast recharging vape pod system that has a rebuildable (RBA) accessory kit that allows for classic style flavor chasing on the go.
The Augvape Narada Pro is the newest version of the Narada pod line that includes an updated pod (tank) and now is controlled by a variable wattage board with dial control button.
Vaporesso has releases the PM80 SE, a slightly bigger version of the popular vape pod but now powered by a single 18650 battery instead of a built in.
It takes the same pods and coils but is just easier to keep going with a fast battery swap.