Yea i can't count how many nanos' my local shop has sold to starters swapping out the .5 coil to 1.2 so they can use it on their older devices instead of pushing subohming onto themI do like TC and it is a bit strange Kanger didn't include it. I think the target is a broad market and TC complicates it out of the reach of beginners. I like it as a nice carry around kit. Compact but packs a nice punch. Mine has decent battery life but I switch between mods throughout the day so my batteries always last through the day. In the price range I prefer my evic vt but I like the subox quite a bit.