Ok, got my Blu Monday, and I can already tell I'm not liking the cartridges that come with it. I'm getting great vapor from stock carts for the first few pulls, and have learned slow and steady is the best way to draw on this thing. I'm having to change carts constantly, and want to start refilling. I have ordered two bottles of juice from Johnson's Creek (Black Cherry, Tennessee Cured-both reduced PG) and am curious as to how long a refilled cart lasts among other things. If anyone has any general tips to get a better vaping experience with this unit, I'd be happy to hear them. Just any general info on refilling, experience with refilled vs. stock carts, vapor production would be helpful to hear. Much obliged.