The flavor from the mesh (m1, m2) coils is the best flavor you can get from pre-built sub-ohm coils, and that alone makes this tank worth the cons. The 7ml bubble glass offers a unique look and holds tons of liquid, though I personally prefer the smaller glass that comes in the kit. You will need small pliers to gently but firmly twist the top (through the fill holes)off to remove the glass because it is extremely tightly installed. There is also a leaking issue if the top cap isn't securely tightened (must be air tight obviously). When properly used, this tank causes no issues and nothing but long lasting flavor, even at lower (recommended wattages. After using the falcon tank, I won't bother with any other sub-ohm tank, I might look into getting an RDA tank, but that's about it. I highly recommend this tank, as long as you're not a noob and know how to properly assemble a tank.