I love it. True 3.7V. And I've been corresponding with Kurt (a frequent contributor to ECF's Ask The Veterans forum) about it so I know he loves his. Like Boodle, I got mine (chrome) from
Hoosier; Kurt got his black one from
BreezEsmokes. Both are great suppliers.
I have found that some of my dual coil cartomizers don't work on one of my two
batteries, but there also are other models that don't like the dual
coils, so I'm not harboring any ill will against the KGO.
NOTE: If – now or in the foreseeable future – you would have interest in the $60 Ego Booster (which turns a fat batt into a variable voltage PV) that I recently
reviewed, then spend an extra $10 for the
1000 mAh (3.2V) Joye eGo also sold by BreezEsmokes. The Booster only works with true Joye eGos, not KGOs, Rivas, etc.