I haven't run my standard battery of ink tests yet, but the pen I used for this review is the Lamy Safari EF with the standard Lamy black ink. There was no bleed, no feathering, and very little show through on the back of the page (see below). If fountain pen ink holds up this well on the page, that says a lot about the type and quality of the paper. Another feature I like about this notebook is the extra thick and rigid backboard. You can take the Inspiration anywhere for inspiration and have a great writing experience.
I received this sample from JetPens, where they sell for $26.00 for a pack of three. More details on the Mnemosyne Inspiration:
These new Mnemosyne notebooks are an “it” product in Japan. They are perfectly designed with the professional in mind and are great for drawing down inspiration and ideas. Everyone from a college student to a working professional will find this notebook useful and particularly well-designed. Named after the Greek goddess for memory, each Mnemosyne notebook features a sturdy cover and is firmly bound with a dual ring system.
These are not the cheapest notebooks out there, but this is a case where I believe you are getting what you pay for.