1) When you can achieve over 300 refills on a single KR808D-1 carto.
2) When you rarely if ever flood your cartos when topping off.
3) When your vast and expensive DIY flavor list has been narrowed down to less than 10 favorite flavors that have absolutely no side effects.
4) When your humongous startup and experimental costs have been reduced to less than $50.00 per month.
5) When you have discovered that you can use ordinary toolbox pliers to slightly crimp the end of a KR808D-1carto so that your !#$%* 901 whistle tips stop slipping out while youre vaping.
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Now listen to me, all of you. You are all condemned men. We keep you alive to serve this ship. So vape well, and live.