Another vote for Apica, fairly affordable and very fountain pen friendly.
Pineider is another rarely mentioned brand that produces excellent notebooks and I believe the Leuchtturm 1917 problems are also a thing of the past. The only problematic ones were the made in China ones anyway, the made in Taiwan Taiwan ones always worked as advertised.

Same here. I like Apica’s wire-bound notebooks as well. I especially like them because they have a limited number of pages. I prefer to fill up a notebook and move to another rather than have one giant notebook follow me around all year long.

I agree about Traveler’s Notebook. From the first moment I held one years ago, I thought, “$60 for a flap of leather and clever elastic?”. I knew immediately I could make my own since I had some leather working tools. I was already a fan of Field Notes so made mine to fit.