The 14k gold nib comes in a variety of options even WA or FA nib if you purchase it from Tokyo Quill. I opted for a very boring F nib. It writes smoothly, exactly what I have come to expect from Pilot for an out of the box writing experience. Coupling the large ink capacity and the F nib means I have an excellent workhorse that can go on long writing sessions without fear of running out of ink.
One thing to note, Pilot recommends you only use Pilot standard or Pilot Iroshizuku inks with their pens. Personally I didn’t have any problems with ink flow, hard starting or skipping with the different brands of inks I’ve used but I have a friend who has problems after filling it with some Rohrer and Klingner ink. The best rule of thumb is probably picking an ink that’s better viscosity.
The Pilot Custom 823 is the perfect workhorse fountain pen especially pairing it with the right nib for yourself. It has the largest ink capacity from what Pilot is offering right now. Plus, it looks understated but classy at the same time. Fill it with a bright ink and it brings a little flair to the table. Though I complain about the very boring fountain pen designs by Pilot, the 3 options that Pilot has for the 823 is by far some of the better choices available. (Not counting all the Pilot Metropolitan or Pilot Vanishing Point options.)