Recently (that is, for the last 2-3 years), I've resisted using the desktop version of browser-based applications. Either they tend to be incredibly bloated and slow compared to the browser itself, or they have a shoddy half-finished feel about them.
This one seems different. While writing this short blog, I got distracted by testing the creation of AppImage binaries (of which the StandardNotes app is one). When I came back to finish off the post, I forgot which window I had been in a couple of times, and flipped back and forth between my "home" browser tabs and the desktop version. The fact that I couldn't really tell the difference means that everything is working as intended.