I'm personally concerned they're going to offer more backwards compatibile games than Xbox One games.
Regardless, if you think about it $9.99 is a good price. In comparison, I waste more than that just on Rockstars or Monsters in a week lol
If you actually went to the website shown in the OP, it's only going to be $9.99 per month.
I wouldn't expect super great games but better than EA Access... Which essentially offers f*** all unless you are into sports games.