It is not chalky and it has a nice flavor. My teeth are noticeably whiter after 1 ...
I received a free sample from Smiley360.  I have sensitive teeth, I drink a lot of coffee and I also grind my teeth....so I usually stick with another brand of toothpaste to help alleviate the pain from sensitivity.  I was skeptical of this toothpaste at first as I thought its whitening agent may irritate my gums and teeth but not only does it contain ingredients to help with sensitive teeth it also whitens, pain free.  It is not chalky and it has a nice flavor.  My teeth are noticeably whiter after 1 week of use 2x day.
Rating: 4 stars