I can state that the older model of the Airflo 40+ Di7 (Expert i think) was a disaster. I personally seen 4 break up within 2-5 hrs of heavy use, (casting pike flies). I expect that the same would be the case with the 7 weights.
I still use mine, but i have a rough knot joint holding them together. When i can afford the new model i will buy it as they are a class line other than the fact that they fall apart at the joint...
I can fire my 8 inch pike flies/parrots 35 metres all day long with my 10 weight (60euro shakespeare rod, not a sage/orvis/hardy/loomis).
I know i couldn't do that with the sixth sense. Its all about the running line.. Great idea if they can build it right..
Just my 2c worth....
Cheers
JJ