I loved it - modded it - for the first few months. It was very easy to mod for a good bottle.
Power Mode worked fine, TC was as irksome as every other TC-mode-mod. Curve was "OK".
After that, the battery-door started to act stupid - batteries not sensed, etc.
After that, the board one day decided there was only one cell, and refused to run.
I loved the body-shape, but screw battery doors forever.
I'm using a ds-style and will be building a PWM mod for squonking.