Best damn article on 3750 qos ive ever seen

I actually found this document off a link from ciscovoiceguru.com but I wanted to mention it here because its absolutely brilliant

https://www.cisco.com/en/US/products/hw/switches/ps5023/products_tech_note09186a0080883f9e.shtml

Quite possibly the most straight forward, best explanation for 3750 Switch QOS i have ever ever seen.