My dentist recommended Mi Paste, and it definitely seemed to help. I ordered 2 tubes of it ~5 years ago, and I use it infrequently, but my sensitivity has definitely been helped.

I have thin enamel on my teeth, I guess it's some sort of genetic thing. I wouldn't say it's solved the problem, I still have to be careful about eating too much that's high in acid and salt (Honeycrisp apples and potato chips seem to be foods that particularly trigger my sensitivity). And when the dentist does a cleaning there are definitely areas that are still sensitive.

But, with infrequent use of Mi paste, my day-to-day sensitivity has largely gone away. Maybe more frequent use would make it better, dunno.