my viewpoint as an e-power 14650 owner is....yes, it is an upgrade from your blu-
could you get a better quality vape for equal or less money...yes.
It isn't exactly high quality-and i have posted on this forum in a few places my thoughts on the button-
if you can shell out a bit more money and want to step into something similar, save the money you would have spent
on the epower and get a quality
mod-
if you are looking for something within the price range of the e-power....
hell, the indulgence looks like a better buy.
Then there are Ego kits, and Rivas.
if you are dead set on getting an epower...find a vendor that sells the 14500 battery tube version, quality
batteries of that size are easier to find.