I have bene wearing my Calvin Klein (CK) Jeans for almost forever! If I can remember, I bought it 5 years ago, and although it was pretty expensive as compared to all other brands, but it's definitely worth it.
What I love about it is the colour as well as the texture. The colour doesn't run off even after 5 years, and it's not too light and not too dark. And also they have different tones of colours at different part of the jeans like a slightly lighter (not too obvious) in front of the knee and shin, and behind the knee, which makes you look taller!
Another thing is the bootcut is really comfortable, because the cutting is just nice! And it is really reliable! 5 years, and I'm still wearing it every day (well, almost)!