Designed to preserve your privacy. All requests to SoundCloud API are done server-side, without logging into an account. Media (tracks, images) can also be proxied if enabled by instance maintainer. No unnecessary requests or telemetry tracking your every move
Lightweight and performant. Both server-side and client-side. Not far behind the official webapp, even faster in some cases
Works without JavaScript (for most of the functionality)
Pretty configurable. Both for instance maintainers, and for regular users
URL scheme similar to SoundCloud's in most places
It's also possible to download tracks, together with metadata