I used the Gust for the first few hundred miles of my hike and then quit using it. I think it would be great if you can keep your total weight to around 25 or so pounds. many times with food and water I was carrying 35 pounds and by the end of the day my back would be killing me. Early in the hike it hurt my shoulders a lot but guess that was partly due to it being overloaded.
See a LOT of low weight hikers using Mountain Smith packs and some who recently switched to them. They have some packs that are 2 lbs but they are not so big. So far the ones I talked to love them.
Wish I could get rid of my 6 lb Dana and go with the Gust but it didn’t work for me. You may have better luck…
Mark Baker