Alexa is a website that ranks other websites by their traffic.

Premise: 7/10

Its kinda cool to have a competition between websites over who receives the most traffic. However only users with the Alexa Toolbar?have their visits counted and almost every anti-virus program detects it as spyware because it communicates with home base. If it were implemented with browsers it would produce more realistic results.

Other Stuff: 2/10

Thats basically all they do. They have a list of the top visited sites and T-shirts with your site and rank but since your rank changes rapidly you'll probably be wearing an outdated shirt.

OVERALL: 5/10
Cool to visit once or twice.
Maybe there's more purpose if you care about you traffic stats.