Jellyfin user here. Started on Roku, moved to a Shield because I needed more codecs (my server's too weak to live-transcode anything above ~720p) and wanted to get there cheap.
Should have just gone straight to the AppleTV, which is where I ended up. Better UI, not shitted up with ads, less jank and crashing (friggin' Android), and none of the problems I'd see with playback of certain combos of audio and video codecs on the Shield. If not for the weak codec line-up, even sticking with Roku would have been better than the shield (yeah, it's shitted up with ads, too, but not as bad—hell, the Apple TV kinda has some, but again, less bad).
Should have just gone straight to the AppleTV, which is where I ended up. Better UI, not shitted up with ads, less jank and crashing (friggin' Android), and none of the problems I'd see with playback of certain combos of audio and video codecs on the Shield. If not for the weak codec line-up, even sticking with Roku would have been better than the shield (yeah, it's shitted up with ads, too, but not as bad—hell, the Apple TV kinda has some, but again, less bad).