I just picked up the Field Journal the other day while heading back from the Seattle area. My first item from Tom Bihn and undoubtedly not the last! The red color is great and is a nice break from the many black and gray bags in the gear closet. It's nice to have an easy way to transport important notes, paperwork, and receipts -- all the while keeping them from getting trashed or lost. No more personal info on Post-Its and hotel notepads!
I also picked up one of the Dyneema "Mini" organizer pockets to clip inside the Field Journal. It's a perfect fit and easy to move out of the way to get to the pen pockets underneath.
Once home I added the included lined paper, various pens & pencils, as well as some tabbed dividers from Avery (5.5 x 8.5" size) for a little organization. I also had Staples cut a ream of plain 8.5 x 11" printer paper in half so I can print and hole-punch my own forms and calendars from here to eternity. (If you're cheap like me, their copy center has a pretty fancy laser-guided cutter and it only costs a few bucks.)
For comparison's sake, I wound up taking a photo of some other notepads and notebooks that are out in the market. From L to R: Moleskin, Skilcraft "Memoranda", Moleskin Cahier, Field Journal, Rite in the Rain 3x5. Pilot G2 pen shown for scale.