The airflow adjustment seems to be very average for this type of rda however if you are using the inserts the AF control becomes kind of unnecessary as in my opinion with the smallest insert it is VERY restricted a bit much for me however I like the medium insert with the AFC wide open which gives me a slightly loose MTL draw which is perfect for me. However if you wanted something kind of in between the AFC should be able to offer even more adjustabilty.How is the airflow adjustment? I gave up on the Cthulhu V2 because the ring was so loose it couldn't hold a tight setting for more than a minute. The inserts should make that less of an issue on the MTL though.