I got my Indulgence in the mail today.
If anyone is considering the 6V, please be aware of two things.
1. The charger can only charge one battery at a time. It is not long enough to hold two 3V batteries. I'm lucky I ordered an extra charger.
2. Choosing the 6V option limits your choice of atty or carto. The atty that came with the kit works, but none of my others work on this. I took the advice offered here and tried my 3 ohm tank, but that didn't work either. Other users may have better luck.
There's nothing wrong with the Indulgence. I'm using it now with an 18650 3.7V battery and all my favorite cartos are performing well.