I've loved Moleskines Cahiers for years now due to them being able to withstand being in my back-right pocket everyday.  They get roughed up a lot, but they take the punishment well.  They are also slim enough that they are never even noticed until I need one. They definitely come with a relatively steeper price than the cahiers you can buy at a discount store, but none of the others that I have tried last me for over a month, and Moleskines last me for several months. The benefit of not having to transfer important info from one pad to the other as often makes the difference in price very negligible. I've also heard great things about the Field Notes of similar size and price, but I've never felt the need to try something different, and I'm somewhat doubtful that the Field Notes' staples will hold up as well as the Moleskines' stitches.