The Notank was designed to be used with mesh. The recommended coiling is the mesh wick rolled around the center post and coiled from there. I ran that setup for a while but got tired of squonking every 2-3 puffs.
I also experimented with Ekowool sleeving the center post but was also disappointed by the results. I almost gave up the atty, but not before I decided to drop my favourite microcoil and cotton on it for a lark.
Basically I marked out with a sharpie where the airhole would be and built a vertical micro. Stuffed cotton wick
through it and vaped away. Ahhh.. Heaven.
The Notank has a deep well not unlike that of the popular Origens, but in a much smaller package. With a cotton wick running through the well I can go 6-8 puffs before needing to squonk. I run a 0.7ohm coil and the vape to me is awesome, flavour is intense due to the small chamber and puts out a respectable cloud.
I did have one of my Notanks end up with the airhole over the negative screw, which made it almost impossible to place a coil where it was needed. I worked around it with an oring at the base of the top cap and got the airhole where I wanted it.
All in all, it's a feisty little atty and I've seen people setup with mesh and loving it. I run with cotton and love it as well. If you can get one I recommend you do so.