Personally I've never worn a stone glacier or a KUIU. I do however, have a good friend who owned a KUIU and had some major troubles with it and sent it back for a refund. I have heard several negative reviews about the KUIU pack frame, which I am sure will get worked out over time but for now I would stay away from KUIU if it was me. I have noticed this site is predominately a Kifaru centered market it seems like. Probably for good reason as they make great packs. Personally I wear a Mystery Ranch and I think you would have to shoot me to get me to wear something else as it stands right now.
So my two cents is this... Stone Glacier, Kifaru, and Mystery Ranch are all worth their weight in gold and between them it comes down to preference and body type. THe MR packs dont fit some guys that well, but for me the MR fits my torso better than a Kifaru in my opinion. I would stay away from KUIU until the issues with their frame get worked out in the future.
Kevin Underwood- http://kunderwoodblog.wordpress.com/
I have used packs from Kuiu (2011 Icon 6000), Stone Glacier (Terminus), Kifaru (Bikini/HC & Bikini/Duplex1), and Mystery Ranch (6500).
I would say all were top end packs. In my opinion, the Kuiu problems are pretty overstated. I have over 100 miles on one, and haven't had trouble 1. I do prefer the SG and Kifaru to the Kuiu however. The MR was an awesome pack as well, and constructed as well as any of them.
However, the other packs are POUNDS lighter base pack weight than the MR. That is a big difference to many people.
IMO the KUIU issues are resolved. I have a 2011 Kuiu which doesn't fit me well, and I also picked up a 2012 model at their shop a couple weeks ago. Their pack guy explained to me all the differences, and the 2012 is much stronger and more comfortable. No screws in the frame, better padding, etc. The 2012 suspension is very different, and the frame itself is a lot stiffer. All that said, I also have a Kifaru Bikini/ Highcamp coming next month which will most likely be my #1. Once I tried one on it was an instant must-have.
Kevin Underwood- http://kunderwoodblog.wordpress.com/
I spent 11 days under the 2012 5000 kuiu with no break-in time. I got it two weeks before I left for my hunt. I had a 90 lb pack out on day 11 with zero problems and I've had many other days since the break-in trip. I have been happy with the comfort of the suspension. My only complaint is that the heavy pack out was not my kill; it was my brother's. For whatever it's worth...
Carl