Ive had an hCigar chi for a while.
Very well made minus the crap spring it ships with, but that is an easy fix.
It is an odd ball in that it is 23mm where MOST 18xxx mods are 22mm as well as most common attys.
The airflow control also shows the age of the design as it is all but obsolete for most modern attys. Only practical use I've found for it is with a Kayfun lite plus, where I removed the airflow screw completely from the KF and used the control ring on the Chi to control airflow on the fly.
There are also aftermarket flat top caps that eliminate the AFC from the Chi if you want a more sleek look while reducing a little length and weight at the same time.