I love that most J.Crew jeans use a thicker denim, even for their spandex blends. These jeans have lasted forever. I've had them for years, and I haven't run into any issues with shredding, which seems to be an issue with women's jeans these days.
The matchstick silhouette is also really flattering, with a tight fit from hip to knee, and a straight leg from the knee down.
A note of caution though, for girls with curves. I've found that J.Crew jeans to be a little lacking in "hip space", if you will. Not enough to be uncomfortable, but if you've got demi curves, you might argue otherwise.