They do look rather nice, I might treat myself when I fill the current one up.
Having said that, I saw a colleagues a few years ago - he was a more than averagely experienced service pilot who had filled up several Navy logbooks. He simply took them all to a good bookbinder who bound them all together in leather - even put a Fleet-Air-Arm badge on the front for him, looked stunning.
Speaking for myself (I fly 3 classes of a/c routinely and others occasionally) I simply took a commercial logbook and made up stickers to change the column headings. CAA have seen it several times and seem quite happy as has my employer.
I wonder why nobody sells a logbook that simply has blank column headings throughout, it would seem an obvious thing to do.
G