I have been through several of their lines, mostly in four and five weight. The area rep always leaves a few demos at the shop each season. I would rank them well below SA or even rio lines in durablilty, slickness and memory. I would never pay for an airflo line but since i get them for free l do use them in the winter or spool them on backup reels.
I have tried 3-4 different tapers of lines from them, ridgeline, sixth sense, and tactical trout. The ridgeline was way better than the others but performance was still marginal. I just took one of of a reel and it seemed to have the stiffest core of any line. Not sure if it was the cold temps but it just wouldn't straighten out. Even when i stretched it out the line would stay fairly kinky. I say don't waste your money and just get an SA line.