Ya know what, I am reluctant to refer to the istick as a mod, though it has features of a mod.
To me it is more the next step in batteries, like the ubiquitous eGo. You use it till it dies and replace it with the next choice. Viewed in the perspective of an iStick being a better battery it is a nice deal. I pulled the trigger and purchased one with a Nautilus Mini bvc, they work well together. I will probably buy 2 ohm coils as with casual vaping I find it too easy to get burning. I bought it for portability primarily to replace my, formerly, favorite stealth vaping setup, 400mah spinners.
I began vaping with a tendency towards gear acquisition and have settled down to working with gear that just works, fussing and fiddling is no longer for me.
My feelings toward iStick are

PS: I like that with the right topper the iStick can stand up on a flat surface