Must be you got a batch made on a friday afternoon. Has not been the case here. Mine all worked great out of the box
Hit it right square on the head!! Well-engineered, but poorly built! Half my replacement heads for them came DOA straight out of the factory wrapper! If you want to take the time to rebuild them they 'may' perform well..or..may not... Very finicky little buggers they are...
Am in the process of rebuilding 10 (that's right 10, count'em 10) heads that either died after a few hours use (gurgling, spitting, juice in the mouth, flooding, etc) or were DOA out of the packaging... Using 2mm silca with 32ga kanthal 4/3 wraps with replacement bottom grommets (AGA Series Positive Post Insulators - 10 pack - Kidney Puncher) that seem to work much better than the factory ones and 4 strands of silca for flavor wicks... They test out at around 1.8 ohms on average...
This, the standard T3 problems, seem to extend, in varying degrees, to all Kanger products -- from T3s right up thru the ProTank -- from what I've seen on the forums so it's kind of a crap shoot... If you get a good one, you're Golden; if you don't, you're SOL...