I have the Cabas and LOVE it! I bought the Westminster and the Evora and ended up returning them for this bag.
It is a very comfortable bag to carry. Sits close to the body, not boxy (like the Westminister) The straps are very comfortable both length and width.
It is very roomy. It is a tall bag so you can carry more in it than I had anticipated.
I use it zipped most of the time because I LOVE the closed zippers on the side.
I can even carry my 11"MBA in it zipped up, which really surprised me.
I have heard others say that the folds take up too much space when the zippers are closed, but I haven't found that to be the case for me. I just tuck things into each of the "pockets" made by the fold and I still have tons of room in the center.
I use it unzipped when traveling and when I need more stuff at hand. Mine does stay open. I have heard some others say that they have a problem with it wanting to fold, but I haven't found that to be the case with mine.
For the price, I could have purchased a NF and a Speedy, but I really think this bag is worth every penny!!! It has a very distinctive look and I love the red interior. It is just a classy bag!!