I have yet to see in any e-cig bad craftsmanship. Could this be a result of the trip from China? The worst part of the e-cig for me is the battery, but that is the nature of the beast and deals heavily with the size of battery required for it to maintain an analog look. As far as atomizers go I have been down-right brutal to mine in comparison to what other people offer up in terms of "abuse" to an atomizer and mine still work wonderfully. As far as carts go, well there is nothing inherently wrong with the design. It could be better but what we have now on the market performs its function.
The battery problems stem from the winky-dinky little batteries needed to maintain that analog look. Once I got past the aesthetic hang-ups of wanting it to look like a cig I found myself an outstanding battery mod and now go over 2 days between charges.
I have a decent list of friends, family members, and coworkers who are all now vapers and most issues crop up when they first switch over and once the "user errors" are dealt with they have nothing but good things to say about the product as a whole. I have not known any of them to receive a faulty atomizer or even to have one burn out on them.
Again, the only reason I can think of that causes these faults is the trip from China, because the products I get from there are rock solid. I've been leary to make that connection though because I have friends and family in the states who vape so if the issue were that prevelent it should have reared it's ugly head with one of them by now, but it hasn't.
At any rate, with time comes more advances and experimentation with these products and soon we'll see the next wave of this model or that mod and so on and so on. The technology is changing month to month now give it another year and we'll be vaping a whole new rig with all new problems.