Interesting all the complaints about the Cubis coils. I've read that it's a love it or hate tank but it's looking more on the hate side.
I have two Cubis tanks and have so far only used the 1.5 clapton and 1.0 SS coils, and I love this tanks. The obvious positives are that it doesn't leak and it holds a lot of juice for the size.
The problem is; they are attempting to market this tank for a variety of users, from beginners to more experienced vapers. In my experience however, It doesn't seem well suited to beginner vapers because it's finicky to get going smoothly, and may not be suited to veterans because most such users want greater airflow and bigger clouds.
It's finicky to get running smoothly because it floods every time you loosen the top to fill or change coils, so I have to turn it upside down and give several hard blows to clear it, but first I must clean out the drip tip and upper chimney or I might get a bit of juice in my mouth. Then immediately after clearing it, I must start vaping it or risk re-flooding if I wait too long. I also have to turn down the wattage or temperature during this initial vaping otherwise the first few drags come out as profusely hot and spitting vapor. After about a minute to settle in, the vapor and flavour is great, especially the 1.0 ohm stainless on TC, and the 4 mil capacity lasts me all day.
With a new coil (1.0ohm SS), I have to give it a serious priming period at moderate wattage/temps, about 14 watts or 350'F depending on the operating mode, otherwise it easily burns. Once the coil's broken in, I can take it up to 20 watts or 510'F and get a satisfying and smooth vape.
It seems that all 3 coil types require a careful priming period and moderate power until the coil is broken in. If not, the user will likely have a bad experience.