The joytech 510 is the best 510 socket I have used so far. It is one of the few 510 connectors that is both spring loaded, gold plated, and sealed against juice seepage into the interior of the mod. A fat daddy socket can't claim that. I also doubt any manufacturer is going to warranty against an uncoordinated Reddit poster screwing in an atomizer. Those people should buy a Zen setup. Reddit is so funny.
Joyetech has produced lots of various devices.
The joyetech evic vtc mini I have certainly does not have a spring loaded connector.