It "works", but it can be really flaky. I've used it to watch at least 2 movies, but at that point it feels really shitty to be jumping through so many hoops, most likely breaking some law somewhere in the process anyway, just to give someone money for something all the while they actively fight me.

Mine sucks bad enough that since I've transferred all my TVs from HTPCs to chromecasts, I'm google play all the way for on-demand movies. I refuse to have both a chromecast and a firestick on a TV, when the firestick would only be used for amazon. The kids are ok using ipads for amazon content for now, and I still left one HTPC connected.

Also, fuck amazon for changing from digital credit to pantry credit for selecting slow shipping instead of 2-day. Google rewards money makes up for it.