I have an AIR2 but don't use it any more. It tended to go into freeflow after every giant stride entry and could only be stopped by disconnecting the LP hose. Quite a few people said they could fix it, tried adjusting it, but it still did it so I swapped it out for neck laced second instead. I saw another AIR2 do the same thing only last week. Just my experience. I really liked the idea of one less hose too.