I wrapped a 1ohm spaced coil on mine with 30ga kanthal with a cotton wick running at 12 watts. It dumps out tons of warm smooth vapor, but yea the flavor is a little muted. I use unflavored e-liquid so it's not that big of a deal, but I do notice it.
I've tried various coils and wicks and this is as good as I have made it perform. I do wish the airflow was a little looser. Mine is a kayfun Nano clone. I thought about drilling out the airhole, but I'm not sure if it would help since the center section where the air comes from can't be widened any.
ok. first, You're doing it WRONG! Why the hell would you use 30gauge? Second, don't used spaced coils they suck...compress your coil into a micro coil for the best vapor production! More surface area of your coil will give you much better vapor.
If you use unflavoured juice, how would you know if the flavour production is good or not? jesus.

The airflow is a bit of an issue for those of us who like to lung hit, but if you open your lips a little while inhaling you'll find much better results. If you mouth to lung, then the airflow is fine.