Kindle Unlimited, what do you think?

So I ran across this today, and I know I can't be the first one to see it.  Apparently Amazon is offering unlimited reads out of some 600,000 titles plus audiobooks, for only 9.99 a month. It sounds like a really good deal, but I wanted to hear if anyone out there has any opinions on this one way or the other

 

 

 

Kindle Unlimited