I used to use the shorty smoktech 1.7's before I switched to rba's, and often got more than a week out of a good one. They're a great option for the REO, just squonk and go, no pre-filling required. The only issue I had with them was inconsistent quality.

I used my Grand for a year and a half then tried to quit vaping (didn't last to long) And YES I went back to the old faithful.........The Reo Grand!! Nuttin Better!!