Jeans are tricky. It doesn't matter if you're Heidi Klum, you've had bad luck finding jeans that fit at some point. Once, when I was in high school, I tried on a pair of jeans and they were tight in the knees. Another time they were tight in the waist, yet baggy in the pelvis. A lot of times, they're just too short (which totally puzzles me, since I'm pretty sure the police would have something to say if tall people just stopped wearing pants).
Look at the model's feet. She's wearing HEELS. Shorter people take that for granted, but I was never able to wear heels with jeans until I bought these. The long version gives me 35" of leg fabric to work with, whereas most stores cap their long lengths at 34".
They're not horribly expensive, either, at $59.50. I'd be willing to pay even more, which brings me to my point. The quest for the perfect pair can make one beat one's head against a wall, so when you find what works for you, get it. Right now. This is a VERY RARE exception to the rule of getting it on sale. Jeans have become such a staple that it's okay to make the investment, especially if you wear them everyday.
P.S. To save you the trouble of a self-inflicted head injury, I recommend trying Express; they have jeans for various body types. Mia and Zelda are for gangletons like me, Stella is a "regular" fit (whatever that is), and Eva is for those with an hourglass figure.