I bought my chrome Cobra Rs replicas and Nitto 555s from them. AM mounted and balanced them for free, plus free shipping, plus the cheapest prices. I got them, and was scared that they may have put some of the tires on backwards (because of the directional tread), but to my relief, they were perfect.
My first and last experience with another company (who I won't name) went down in a not-so-good way. Lesson learned: don't deal with anyone but AM.
As someone already said, I can't understand why every company can't do what American Muscle does.
-Will