Wendy H.wrote a review of Prana Briann Pant - Women's on July 23, 2018
Familiarity: I've used it several times
I love these pants and use them for every day wear and for climbing. They're really durable, even after a lot of brushing against rock outside. They're water-resistant, but definitely not water-proof. Since they have the scotch guarding, it's a bit stiffer when you first wear it, but will soften a little after a couple washes. As for stretchiness, they do have a bit of stretch (more than your average pair of jeans, but definitely don't expect leggings).
I usually wear between a size 4-6 pant/size Small in leggings. These pants fit really well and fitted on my thighs and calves without suffocating my legs, but the waist is a bit looser than I'd like. Since it fits well on my legs, my pants aren't going to fall off, but it's got a bit more fabric when you sit down (I'm choosing to wear a belt to avoid some of this). I have these in 3 colors (black, coal, and moonrock) and compared to the black and coal pants, the moonrock is noticeably smaller even at the same size 6. They fit a lot better in the waist than the coal and black, but since it's also a bit tighter in the legs, they're maybe a little too stiff in the knees to climb in. Regardless, I really recommend these pants, but I wish there were a drawstring like on the men's Zion pants; the sizing might not be very forgiving for every body type either.