Wow, this thing really rocks.
I've been a dyed in the wool vanilla Boge carto user for a year now, since not long after I started vaping. Nothing else I've tried matched them for reliability and performance. I recently bought an e-power so I thought I would give one of these guys a test run. So far, it's the first thing I've tried that meets or probably beats my Boges.
Vapor production is good. Consistent, big clouds, nice warm throat hit without being harsh or hot.
Flavor is outstanding. One of the reasons I like the Boges is that I think they stay pretty true to the juice. The flavor on this may be even better so far.
Holds a TON of juice. Easily 4+ ml. Dumped the first bit of a new 30ml bottle in and only topped off once so far.
Fit and finish is really nice with the e-power. You can tell they are designed to match. One of my nitpicks about the e-power is that the cone threads are sort of wonky with different cartos/atties, so I'm glad this makes for an attractive profile without using the cone. One tiny thing is that I am not a huge fan of the logo, and I wish it lined up with the switch button. The tip is nice and comfortable, like a giant version of the plastic tips that come with CE2s.
Can't really say yet how much this decreases battery life on the 14650s.
Disclaimer: this is my first experience with a DC carto, and I've been using it < 24 hours so I will report later on reliability. But so far, awesome. If you own an e-power, I think this is a must-try. It really kind of "completes" the experience.
