Currently I have two TL Ambush Slings. The first is the big leather version that I like for dry, cold weather. I try not to get it wet for obvious reasons. The other is the green mesh version, which I like best of the two. It is so light it is hardly a burden at all to wear and wet hunts have little effect on it as you can pretty much shake the wet out of it after a hunt.
I looked at the Guido's web, checked in with Eberhart as I had some reservations, which he confirmed for me, and now have my sights set on an Aero as soon as the new version is released. I'm expecting to be impressed big time!