I'm really liking this new eCig system. I'm getting twice as much battery then a MEGA EGO Battery with the 18650 Samsung Battery. I've been using both the Nautilus Clearomizer and Aerotank MEGA with low resistance coils on this device and it is seriously best I've tried to date. Nice and small, long battery life, and huge vapor. A little hard to get used to shape at first, but the performance definitely overshadows any problems I personally had with a box design. Cloupor Mini is my new fav!!!