Don't get me wrong, I've been happy with mine other than the hip pain that happens when I hike multiple days with it. But that's just me and my boney-ass hips. I am currently using a Kifaru belt that is better but still not perfect.
The squeak is weird. I still haven't figured it out but it happened with every step and even my hunting partners noticed.
All of the straps can come in handy when fully loaded, but I realize that 90% of my usage is daypack mode and they are useless then. For dayhunts, the main pack alone with the wing pockets doesn't give me enough space. Adding the backpack on is clunky and heavy for what you get. In fact, I threw on a cheap "packable" backpack instead and was much happier.
All that said I was ready for a change and with the Kuiu sale I got a 2200 c.i. replacement to try for only $310. We shall see.