I joined Kindle Unlimited when it first launched and I hated it. None of my favorite authors were on there. I generally prefer indie authors. Kindle Unlimited (#KU) is evolving and changing though. More authors are joining KU as other platforms don’t seem to be performing well. But if you want to see what authors and titles are on KU before you decide to take the plunge, Amazon makes it very difficult to discover that information. Here’s a link that should help: http://amzn.to/1fx6AcI .
The page will look something like this: