Thanks for all the great feed back on the review of the Flex by Filofax, some of you have asked some questions, so I thought it best to add the answers to these to a separate post.
A couple of points to clarify, although I compared the Flex to my A5 Malden, the cover of the Flex is not made from leather. It's made in some form of synthetic material, but it has the look and feel of leather....but not the smell!!! As you will have seen from the photos, the detail in the stitching is very good, very close in fact to the stitching on the Malden. But in your hands you would know it wasn't leather straight away. However, I think it is still very well made.
The pockets that the inserts fit in to on the A5 (page size 14.8 x 21 cm) Flex are 21.5 cm tall, the pockets on the Pocket size (page size 8 x 12 cm) 12.5 cm tall.
Weight wise with the A5 Flex fitted with the thin note book and the diary I would estimate it to be lighter than my Malden A5. With the A5 Flex fitted with the thick (256 page) note book and diary I would say it was slightly heavier than my A5 Malden. Although you will have to trust my judgement on that one, I don't have access to scales at this moment in time. I can measure them more accurately in a couple of days time.
Anyway some more pictures:
In this first picture is my A5 Malden at the top... if you need a clue... it is the one with (skinny) rings! and below it is the A5 Flex, with the diary (144 pages) and the thin notebook. (80 pages) In this picture both are inserted in to the inner pockets. Both overlap each other when open.
In this next picture again the same inserts in the Flex, except this time they are inserted in to the outer pockets, so when both are open they would both be fully visible (double page).
As you can see it makes no difference to the thickness and the pen holder (not shown) will still fit in an inner or outer pocket, this lets you have the pen in the middle or outside (like the Malden).
It is also possible to have one insert in an inner pocket and the other on an outer pocket. Like in this picture:
In this picture, I've changed the notebook for the thick (256 page) size and still with the diary insert. I had it set up as Diary in the back cover (on the right) and notebook in the front cover (on the left), but you could have it the other way around just as easily.
This final picture shows the above set up laying flat, as you can see there is still a reasonable gap in the middle for the pen holder to sit in.
People have asked about availability. Now available on the Filofax UK website.
If you have any more questions add them in to the comments and I will do my best to answer them, although there might be a bit of a delay as I'm travelling back to France tomorrow.
Although when I'm back in France I'm going to investigate doing a video review of the Flex, because I'm sure that will answer some more of your questions or confirm things slightly better.