I have run the Bontrager lights as that is what my local LBS stocks and over the past 4 years had just 3 flats in about 11k miles. Just last weekend had the first flat that I can recall since late fall 2009. I really try to avoid road trash, gutter riding and bunny hop most tracks, ruts etc. so attribute some of my experience to riding style.

I also install these on my wifes bike and she seems to average about a flat every 1000 miles. We ride alot together on group rides with friends so even with similar tubes and tires - Mich Pro3, we do have slight different experience in the real world.

A friend runs the Mich lights and has the same experience I have with the Bonty lights.