I use it. It's just as easy to set up and run as the other two, whether you use the tarball install, repo packages, or docker. While you're at it, look into Prowlarr also to manage your indexers and download clients so you don't have to make changes on all 3 manually. Then maybe look into Ombi to manage download requests. I like Overseer better, but it doesn't support music yet, unless something changed recently. The biggest hurdle is that in contrast to the TV and Movie categories, the file naming conventions for music downloads are not nearly as well standardized and enforced. Lidarr does a great job of shifting through and finding what it can, but I still get a lot more releases that require manual importing than with Sonarr or Radarr. Maybe I just need to tune the filters better. Discovery isn't really something Lidarr does yet, although there may be some forks working on adding it. Last.fm or listbtainz can help with that, or there are a bunch of self hosted media trackers that have recommendations built in.