update.....
Earlier I speculated that the 'head' (seems to be the right terminology for what I was calling the 'module' and others have called the 'core' - ie. the spike/plate/coil/connection unit) for the A type may fit the B type when that one comes out. It's looking like that won't be the case. Someone modded the A 'head' to fit a B and some modifications were needed - 1. the B tank was a bit long and 2. Some airflow slits were needed. So If you're a B type vaper, then don't stock up on A 'heads' thinking they'll fit the B's.
Otherwise, the eGo-c is vaping as reported - no burning, no discoloration in juice, no leaking, great taste on all types of ejuice. Runs a bit cooler than thet T's.