I tried some Not Your Father's Ginger Ale a couple weeks ago. Not bad, but very gingery. If you're not a ginger ale fan, you won't like it.
There's a bar down here by me that had the Not Your Father's Orange Soda on tap 2 weeks ago. My brother tried it and said it wasn't bad.
As for the Root "Beers", I think my favorite one is the Coney Island kind. Not as heavy as NYFRB.