I'm thinking of moving from a Moleskine planner to a Filofax (more adaptable and customizable). The A5 is the "desk"-sized version, the Personal is smaller. I'm curious if there are any Filofax users on the group who would care to comment on the virtues of either format. I am self-employed and usually at my desk (90% of the time), not running around to meetings and appointments, so I think I might like the bigger A5 size. At the same time, I don't want it to be so unwieldy that I don't take it with me when need be. Most of my bumps with GTD come in not documenting all my projects thoroughly, and in being slow to review, so I have thought the A5 might help me over those bumps, with more room to write. Yes, I've looked at both sizes in the store--just curious about any real-world usage.

Also, can anyone speak to how the Filofax paper holds up with fountain or gel pens?

Thanks,
Jeff