Kindle Unlimited

Anybody subscribe to Kindle Unlimited? I'm trying to figure out if it's a good deal for me or not. I'm in the 30 day trial right now. I looked for two books, both on my TBR list. One they had, the other they didn't.  I don't feel like going through the 100s of books on my TBR list to see how many they have. Just wondering if they have most of the books you want to read, if you've found it a good deal, etc.