I got my Ikon tank in with the battery.
Filled it up with some 70/30 pg/vg BWB Pear, and vaped the whole tank dry. Never once did I have a burning taste, never once did it leak (except the drop or two atop the silicon cap, but thats not really a leak). I'm about to refill it again continue vaping. IMHO, these things are incredible.
The flavor is great, the vapor is tremendous, TH is nice and warm. I couldn't ask for a better way to vape, honestly. If I had stacks of perfect Ikon tanks it would be all I would use. Its just so simple and a chain vapers dream. I haven't beat the hell out of mine yet, but I've never had such amazing performance from any tank/ce2 mod, and I've tried a LOT.
Possible improvements for it could be filling through some sort of bottle adapter, and maybe a little plug for the needle insert.
I'll just say this, if ANY improvement is made from the beta product I have received, (Ikon tank) then IMHO it will be the greatest thing to happen to vaping so far, and I know thats a big statement, but again, JMHO. I really love these things, i can't wait to be able to order them, and hopefully can get it hooked up to my ProVari.
Will update with anything noteworthy
Btw, Thanks Isaac. You truly are da man.