I have one and love it. Now it is better than the Vamo V5 which I also have but will be battery dependent when in VW mode. I found it works best with the:
MNKE Rechargeable 18650 IMR 1500 mAh Batteries
Maximum Continuous Discharging Current: 20A
Maximum Rated Discharging Current: 30A
Maximum Pulse Discharging Current: 60A
Maximum Continuous Charging Current: 6.5A
SONY Rechargeable US18650VTC4 IMR 2100 mAh Batteries
Initial Discharging Current: 15A
Maximum Rated Continuous Discharging Current: 30A
Maximum Pulse Discharging Current: 60A
Maximum Continuous Charging Current: 6.5A
Efest IMR 18650 2500mah 35A
20A continuous discharge
35A max pulse discharge
No problems as reported by PBusardo in his review of the Lambo 6. Best value I've gotten yet and that includes the Nemesis clone.