I've had my AST/Ranger combo for a year and a half, maybe 9,000 miles. They have been great! The AST vents pretty well, although if you are tucked behind a Barndoor XXL windshield you won't get much flow-through. I've experienced just a little rain leakage at the chest and arm vents, but that was after four hours in a real frog-strangler. Some care is needed in sealing the zipper flaps to minimize leaks. I find the AST comfortable up to 80 degrees and useable to 85. Lots of pockets. Pretty well made. Love the hi-viz yellow!
The RangerII pants are OK, too. There is no venting but they seem well-built and durable. I found the full-length Velcro side-zipper flaps a pain to un-stick for un-zipping but solved that by sticking 6" strips of Velcro 6" apart along the length so there is less of a struggle.
Conclusion? Well worth the money, IMO. Quality of construction and materials is not up to the Roadcrafter 2-pc, but there are some nice design features not found on the RC. And then there is the price difference. I'd buy again.
pete