Excellent toothpaste!
I had gotten a great review from my dental hygienist after using the Premio.  She told me that she did not need to polish my teeth after my 6 month cleaning as there was no staining whatsoever.  I drink a cup of coffee daily and red wine occasionally. I upgraded to the Royal and have noticed that my teeth are feeling smoother than before.  Will continue to use both and alternate every other day.  Great stuff.
Rating: 5 stars