I am a short Asian with unusual body figure. I am 4'11 in height and it makes it so difficult to buy a jacket, especially in western country. Although I am short, I do have bigger upper body, which makes it likely impossible to find the best fit. According to the size chart, I got a size Large in bust, size M in waist and then size S in hips, of course size XS as in my height and arm lengths. So at first I order a size S, as I usually wear size M for this brand's fleece, and it's always like loose fit and I did hear people said it runs large. So I got the small, tried it on, the zipper zipped all the way up nicely, good fit, then it got stuck right on my chest. Then I returned it , got an exchange of size XL , apparently I went too extreme. The size XL definitely makes me look like I'm being wrapped by a big plastic bag, however, like miracle, everywhere is loose except the length of the sleeves definitely fall in the category "fit". So then I did another exhange, this time I got the L. Finally this is the right size for me. The chest fits so well, not too tight not too loose, the waist is a little loose but its all good since I would do layering underneath, well down jacket is designed for cold weather so I do feel like its better you leave some more room for thick clothinga under it. The hips are fine fine since you can use the hidden strings inside the side pockets to adjust the hem, I use them to tighten it up a little so it doesnt really look as baggy around the hips. And of course the sleeves fit perfectly as well. Its pretty roomy around the shoulders so I would move comfortably while hiking. For reference, my bra size is 34F or 36 E in western countries and 36 G or H in most Asian countries. Waist measures at around 27-28. Hips are around 35. I will say stick with the size chart if you want a good fit with fairly light layering, go for a size down if you have smaller chest size, and a size up if you are going to do bunch of layering underneath ;)
I just brought this jacket with me to Yosemite, where it was around 20 fahrenheit at night and around 35-40 fahrenheit by the daytime. I was wearing a fairly thick hoodie underneath and it definitely kepy me toasty warm. I have only been wearing it for a very short time, so I cannot really write anything about how durable this jacket is, but so far it does look like it has good quality material. It was raining and snowing a little up there, but the jacket repels those water droplets nicely. This down jacket is highly packable and extremely light as well. I got the navy blue one, the color looks excellent like the picture shown here but note that every cellphone or laptops are different.
By the way, backcountry.com does have a superb excellent customer service, I did my exchanges without any pressures since they are very patient with my concerns and being very efficiency and friendly. I did 2 exchanges until I got my right size within a week, this how efficiency they are and how fast the shipping it is. :) This is my happiest purchase.