After using Tiffany and then Coach planners for years, I switched to Moleskine for 2010. I've been very happy with them. While no planner is perfect, the Moleskine Daily has been the best for the way I keep track of things.
The pocket (3.5" x 5.5") is big enough to write in yet still fits comfortably in most purses. The large (5" x 8.25") is well-suited for a food and/or exercise journal. Both are almost 1" thick, as is to be expected from a page-a-day planner.
I tend to slip invitations, receipts and other ephemera into my planner, and the elastic band keeps everything in place. Miraculously, the elastic has never become too stretched out. [See photo of my 2012 version of the Moleskine 2013 12 Month Daily Planner Black Hard Cover Pocket (Moleskine Diaries).]
It would be nice if the month-in-review pages came at the beginning of each month instead of all at the front of the book. It would also be nice if the hours/time on the days began before 8 AM and went past 8 PM. And if Sunday had hours/time. I wish the bottom corners of the pages were perforated a la Coach spiral dairy as I prefer that to the bookmark as a way to find "today" quickly. However, these aren't deal-breakers for me.
In at least one review of a Moleskine daily planner, the reviewer complained that on the month-in-review pages, the weeks begin with Monday. For me, that's an advantage. (After all, Saturday & Sunday are the weekEND.) Personal preferences aside, Moleskines are from Europe where, as in most of Western world, the week begins on Monday. It was described as "frustrating" and "confusing" in one comment. I can't believe it's that big an issue, especially in a DAILY planner, but if it would be for you, you may want to find a US-style calendar.
Bottom line: These are very good planners. The hard covers are sturdy and the elastic is stretchy and both hold up all year. The design makes them flexible as far as how you use them (appointments, journaling, food diary, etc). The price is reasonable, making them a great value.