This joyetech ego 1000 mah with stock tank is ok,im learning its all in the way you puff on it and its actually a skill ,prime slow with easy puffs and and long easy slow long draws,maybe it took a while too break the sucker in,but its all good,the main thing is it keeping me of toxic laced chemcial filled tobacco and thats the main thing,cant wait too upgrade to the Vamo system when my ego dies.