I have been setting it up on my home, still not done but I can already see some benefits from it, e.g. I'm about to build a new server and migrate a lot of stuff to it, with ansible it will be very easy to just move some configs around and setup the server in no time at all. It also is encouraging me to keep a standard on how I do things which is great, and after setting up some initial things now adding new services is quite straightforward.
Overall I think there are a lot of positives about it, especially if you have multiple machines to manage. But even for a single one the fact that you can recreate everything from scratch in just one command is quite awesome considering the amount of times I've redone my server from 0 for different reasons over the past years.