Given lack of knowledge of CS reps in store and on phone, and no response in the forum, I can't really recommend Flex right now unless you have paid streaming services like Netflix and don't care about anything else.
The only plus is the box is rent free (additional boxes cost extra).
I had really hoped to have FULL access to my Movies Anywhere library, I don't (just a fraction of movies an no tv series). I hoped to have VUDU offered to access the rest of my digital library that is restricted from Movies Anywhere, it isn't.
Other streaming devices seem to offer what I'm looking for so I may be switching.