The nib paired with the body of the Horizon is a really comfortable writing experience. It's a "full-sized" pen, meaning it's about the same size as a Lamy Safari. As such, I don't like posting the cap when writing. The cap can securely post to the back of the pen, but it messes up the balance of the pen for my grip style.
The Nahvalur Horizon is available in Twilight (seen here), Dawn, Dusk, and Aurora. Seriously, good luck choosing one from that lineup — they're all beautiful. There are also plenty of nib options from the typical EF to B, and then some of the colorways also have some extra nib options like the stub shown here and a double broad. This is a fantastic writing instrument that doubles as a piece of art. At $168, they're also a fair price for what you get.
(Pen Chalet provided this product at a discount to The Pen Addict for review purposes.)