I'm still hesitant to punch my own carto's. Are the RBA's pretty easy for you so far?
I see the RBA's as a step on the rung. Think of a ladder. Moving from a fixed voltage to variable voltage was a step up. Cartotanks were a step up from clearomizers or cartomizers used alone. RBA's are another step up, possibly two steps as far as the learning curve.
However, as long as someone has aquired the necessary information thru research, studied a couple of key videos, and has the necessary tools, anyone with some determination and patience can learn to use these.
For some people it involves some trial and error, just like cartotanks can be for some. And maybe arrowsmit got lucky by picking my brain on what I did to get my AGA up and working great, through my own trial and error.
I will say I'm so glad I took the next step. These are the best juice delivery device I've had yet. They're not fool proof to say the least, but when they work well, they're great. Unbelievable vapor; it often makes me laugh out loud to myself. Flavor matches or exceeds a fresh carto in a new cartotank setup. They WILL leak if the juice fill hole is left out and you lay your PV on it's side. Putting the screw in the juice fill hole will affect the vape, so I have learned to leave my RBA's for home use only unless I add the screw.