be careful!!!!
I found the front hubs to be fine.
As for the rear.
1. very lightweight.
2. difficult to lace with DT spokes, spoke heads did not fit in flange easily.
3. sealing not good in muddy conditions.
4 easy to strip & clean, however this voids warranty, Extralite told me that the rear freewheel tolerances are critical and need to be set at the factory. Hardly practical.
5 freewheel jammed on my hub in a race after a spring pawl in the rear hub broke.
I am not heavy on equipment, this is the first hub I have ever broken, for example I have raced on AC hubs for several seasons without problems, and these are considered fragile by many.