The fabric is silky smooth and very comfortable. I can see why some people would wear it as a nightgown. It seems to be well made. As a full slip this works well under dresses, although the lines of the v-neck and seams show through under my thinner dresses. I like that the straps are adjustable. I was able to make them longer so the dress would sit lower than a deep V neckline while still offering coverage under a less-than-opaque white fabric.
I usually wear a size 6 or 8 dress at 36-28-38 and ordered this slip in a medium. It is still a bit loose fitting and I probably could have gone with a size small.