I am using Stan's Tubeless conversion kits on a pair of Neuvation wheels with Hutchinson Intensive tires. The conversion was super easy, and the tires have held up superbly through the winter. I have put almost 2000 miles on the tires, with no flats. Most likely I will need to replace the tires before a flat ever occurs.
Edit: In winters past, with the same amount of riding I had at least 2-3 flats on Conti GP4000 or Gatorskins.