I've used Guide, Axis, Yukon, and Chugach (even the Jetstream by Sitka). If I was to only pick 1 soft shell from KUIU I would go with the Axis. The fit is a little better than the Guide (IMO) and it does a much better job of wind protection. I wouldn't use it as primary rain piece by any means but it will handle a quick shower, and if your moving it drys quick. I do wish it was slightly more insulated but I'm sure thats coming. Windproof/Windstopper is nice in really cold conditions but I'd assume you'd use that Yukon if that was the case. To the me Axis has more stretch than the Guide as well.
Here's a pic of my Axis getting a "rain test", this jacket wasn't meant for this type of rain but like it mentioned it dry's quickly if you're on the move and can generate some heat. Don't buy the access thinking you'll leave your rain gear at home. You may be able to get by with dry snow, light drizzle followed by sun/heat, but defiantly not protecting you from a major shower.
After using both Sitka Jetstream and the KUIU Guide and Axis soft shells I always come back to my Arcteryx Gamma MX. (IMO - If it had pit-zips it would be perfect)