I actually had the opposite experience with my Diva jeans -- they kept their shape perhaps too well. Sometimes I'd take them off at the end of the day and if you held them up, you could still see my silhouette and all my curves filling out the jeans.
Put differently, I felt like the jeans were a little too stiff and could have used more spandex, for the sake of both fit and comfort. Unlike other jeans, they didn't grow with me when I gained a few pounds, so they're now relegated to my aspirational pile of clothing.
That said, I thought they were quite a decent pair of jeans with great bang for the buck and, had I not filled out, they would still be in regular wardrobe rotation.