One boro in particular. The mission xv orbit rba. I've had nothing but trouble outta mine. I found a great wicking tutorial and realized I had been wicking mine wrong the whole time. I was filling the entire wicking channel with cotton. Almost gave up and sold my aio and all my tanks. Got it wicked correctly and it's just a glorious vape. I get better flavor than out of any of my rdas. It's better with thinner juice like 60/40. I had some Carmel brulee by coastal clouds. Omg it was just perfect. Can't wait till I make another juice order. I have 70/30 now. Just not the same