Anyone have experience with these shingles?

http://www.iko.com/roofing_shingles_...nsulation.html

The second estimator for my new roof recommended this brand. He claimed
that Owens and GAF have had major warranty-related expenses, both having
filing bankrupcy to avoid payouts (mainly due to asbestos issues) and
screwing the homeowner. He claims IKO never did this, but in googling
around the discussion groups, a lot of people don't think much of IKO.

The estimator's recommendation was for the IKO Cambridge AR line. (AR
means algae-resistant.)