The setup process wasn't too bad, but the Shield might be more money than you want to spend.
I use it for Netflix and Plex, as well as Spotify, with no problems. It tells me that Netflix is not optimised for the device, but plays fine. I've heard that Netflix may limit it to 720p, but the quality is as good as you can expect from Netflix anyway.
Plex works perfectly, can stream 4k from my media server with no issues. I will eventually transition to Jellyfin, once I convince the 4 other households that have access to my Plex library to sort themselves out.