I've heard Microsoft Surface pens are compatible with the Kobo Sage and Elipsa.

Why did you pick a "Renaisser" over the standard Kobo stylus?

I've got a Sage myself and have toyed with getting a stylus, so if you can offer a compelling recommendation over the official stylus, that would save me fifteen bucks.

The Renaisser that I picked, the 520C, was Microsoft Surface compatible. It has two advantages: built-in usb-c charge port (vs. the weird "aaaa" batteries the stock and others take), and a felt-like stylus that felt way less slippery compared to the stock stylus. Edit0: also, unlike the stock Kobo stylus, the nib seems much less prone to wear - the former wore down in about a month while the latter is still going fine months later.