Tamko has a clause in their warranty that states every issue must go through arbitration, every issue. They now have a class action lawsuit against them. You will likely never have a claim paid in your favor if it goes through arbitration. But, even if you did, the roof has to leak. It the granuals falls off, not covered. It it cracks, not covered, it must leak.
After hours of reading warranties, I have concluded that CertainTeed has the best warranty. They cover astetics. If they roof just doesn't look right it is covered and they do not put anything in their warranty about leaks. I found this "leaks" clause in every warranty but theirs. I'm going with LandMark from CertainTeed.
Read the fine print and you will come to the same conclusion.