I have the Icon Pro with 1850, 3200, and 7200 bags. I also purchased and returned the Ultra suspension and Ultra 1800 and 3000 bags.
I'm neither a Kuiu hater nor fanboy. I'm also not an expert... just one dude who likes to hunt.
I've had the 1850 and 7200 since 2014 and the 3200 I purchased last year. I've used them for:
- Many, many miles of day hiking & multi-day backpacking with 30-55 lbs loads.
- A fair amount of day hunting & multi-day hunting in Nevada, California & Alberta
- One solo, DIY caribou hunt in the Brooks range.
My thoughts:
- For light loads they are great. I love the 1850 and 3200 for day bags. The 3200 is a great size for day trips as well as weekend trips. If they made the 3200 originally, I wouldn't own the 1850.
- The 1850 squeaks a little when not loaded down. I've tried to fix it but I've only been partly successful.
- The 'Ultra' system doesn't make any sense to me. You only save a few oz, but you loose 100% of your organization. I really like the pocket setups in all of the Icon bags. Simple, sensible, just what you need without being over engineered.
- I was completely happy with my setup until my caribou hunt. Up to that point I had only packed out pigs and deer relatively short distances (longest pack out was a pig <2 miles). When I got my caribou I spent a full 48 hours packing it out. Any way you slice it, a packout like that is going to be a suffer-fest, but when I really tried to load the bag up I wasn't happy with how it handled the weight. The biggest issue was that I didn't like how it transferred the weight to the belt. It seems like it wants to rotate your pelvis backwards.... maybe I needed more core strength, but it seemed like the bag should have done a better job.
- I haven't had any issues with straps not staying tight like others have complained about.
- I doing a solo elk hunt this year in a wilderness area. I've been mulling upgrading to Kifaru. But I'm also thinking of getting some swaro el's, and maybe upgrading a few other pieces of gear... trying to decide what's more important. I can definitely suffer through a long elk pack out with my Kuiu, just not sure if I want to.