Awesome fit by Arcteryx.
I can't believe I've wasted money on other pants when this one has everything right. I bought this pant as well as the Arcteryx Parapet. This one was my choice for a 5 days trek in Peru. The waist rise was high enough to stay put and was definitely made with a backpack hip belt in mind. The knee gussets allowed me to take long strides and crouch awkwardly despite having little stretch. And like others have said, the knee gussets aren't prominent in real life.
I'm 140 lbs, wear a 6 or 28 in most pants, the 6 waist was awesome and fit my athletic hips and thighs great.