Yes the premium 100 is a much better product. The battery is larger and the PCC is MUCH improved. You don't have to screw the battery into it and it has level meters (leds) for both the charge of the battery and the PCC. It's also constructed better. I get about a half day's vape out of the premium 100 batteries (I'm not a heavy vapor). For refrence my 650mah Kgo last's me about 1.5 days.I second that, I started with the Blu and then moved up to the kGo also from darkcityvapor.com, finally I purchased my Provari.
Just out of curiousity, is the Blu Premium better than the regular one?!
Don't mistake me though...it ain't a Kgo or Provari. While it stacks up well with other cig-lookalikes, it doesn't produce the vapor or throat hit that larger batteries will give. I keep one in my pocket at all times for a quick vape in the car, stealth vape or emergency backup when my Kgo dies. It's very small and I don't even notice it in my jeans pocket.