Just a side note here, FWIW:
I've been using Visions since they first came out exclusively. IMHO, there is nothing better out there, if you are not into high power vaping.
They are a tad quirky. They don't like voltage much higher than a standard eGo will deliver. You have to play with the tilt as you go - increase it steadily as the tank empties, and the last quarter tank or so I vape horizontally, like a cigarette. If the wicks are not touching the liquid, you have to dip them once in a while. There is no need to turn it upside down - just dip the wicks. You don't want to tip at all though if you fill it to the top - it will most likely flood and you'll have to blow it out.
Given the above, I've been using 100% VG, including Boba's, with no dry hits, and vaping it down pretty much, if not to the bottom, then close to it. And I chain vape to boot. Fast.
If the taste if low, or bad, check the resistance. I buy SR (LR or HR are a waste of money for me).