to
@Bitter Jeweler 's point, the subox is a great little kit as it stands - using with kanger stm that comes with it, awesome - it DOES get a little persnickety with other toppers, though - something to definitely be aware of... if pin gets pushed in, it can be finagled back up without to much difficulty, but is definitely something to be aware of...
now, if the tank was a top fill... lol
from what i understand, kanger is working on a v2 with a spring loaded pin - have not heard anything about a release date yet, but it is supposedly in the works...
all that being said, have had my subox several months and still use in my daily rotation (though my smok x cube II is front and center mostly lately)
vape on!