bswrote a review of Arc'teryx Bora AR 61L Backpack - Women's on October 29, 2018
Familiarity: I've put it through the wringer
I bought this pack for a 3 week trip to rainy New Zealand. It worked OK, but I didn't end up loving it. No matter what i did with adjusting it, I just couldn't get it to fit me all that well. So I ended up selling it when I got back.
Good: Fabulous waterproof bombproof materiel (just make sure the side zipper is zipped up all the way!) I wish all packs were made of this stuff. Good pockets and features. High quality construction.
Not so good: It just didn't fit me very well, in spite of so make sure it fits you WITH A LOAD before you buy it. If it fits you well, I'd guess it's a great pack, but for me it hung awkwardly and was tiring to wear. Also, it is very expensive of course!
I went back to my trusty Gregory Deva which is the most comfortable pack I've ever had.