The unique thing about the eRoll is that you don't have to unscrew the battery to put it back in the PCC to charge.That doesn't help Either.
I can handle a Small mAh battery. Sometimes it's nice to just drop a PV in a Shirt Pocket for a quick trip to the store or what not.
But having a Tiny Battery that doesn't work with all my 510 Stuff is Silly to me. Might as well just by a 510 Battery.
So the 90mah battery is mostly not an issue unless you intend to chain vape.
The other good thing about the eRoll is that the PCC is very slim and pocket friendly.
As far as I'm concerned the eRoll is good for what it is, and only what it is.
It is great for portability, but most definitely not for chain vaping.