I did the 3-year plan because why not, but I definitely already got a couple months worth of value just from watching a bunch of bonus features from various Marvel movies. That's just fucking awesome, and more services (particularly Netflix) need to include that shit. I torrent most everything, and missing out on the bonus features is one of the things I noticeably miss most. Back when you'd get the disks in the mail, I'd watch a large percentage of all the bonus content (partially because you were going to have to wait a couple days to get something else), and you have to go out of your way to find bonus features in torrents. Usually it involves downloading an entire disk image, which is a) harder to get streaming most of the time, and b) never the first thing that gets released, so you'd typically have to download two versions of a movie just to see the bonus stuff.
I'm already looking forward to watching Endgame again with the commentary track. And over the months I'm sure I'll watch a ton more older movies with commentaries. That's not a bad deal for a couple of bucks a month.