I have been using this toothpaste for the past month and already can feel the difference. My teeth are less sensitive when eating hot and cold items. The only downside is that the taste while good, isn't great. I am still not quite use to it and it is quite granular.

I got this product for free they are giving out free samples.
I find the flavor to be nice.
But the protection against sensitivity is small ,
Maybe it's just me

Colgate toothpaste is one of the market leaders for a reason: it's good stuff. I don't know if it really repairs enamel, but it leaves your mouth feeling clean and fresh. It does seem to help with sensitivity a bit too.