The AC freehub is nearly perfect. Lightest for the $. I have sold 25 over 4 years and I have no more then one fail every year or two! Compare that to a 142 XT where each hub (that is ridden) fails in 1 to 6 rides!!!

Cost only!

I only buy AC, WTB with the same freehub, DT 240 and XTR,

Nothing

Breaks the company does not back the product up

The product makes a bad click noise. The Warranty on the product is horrible. Can't say much more get some DT Swiss hubs.