Everything I've read about zipps says the hubs are junk.
This is true. The fronts explode, and the rears either have massive amounts of play or massive amounts of freehub drag. The rims are great, but the hubs are awful. I've ended up having my pair of 404s rebuilt onto Tune hubs, the Zipp ones were so awful.
The CPSC notice refers to only one failure but I'm aware anecdotally of others. I finally got round to taking my three (one of which is technically @Cycliste's) to Evans yesterday for the hubs to be replaced.
This is true. The fronts explode, and the rears either have massive amounts of play or massive amounts of freehub drag. The rims are great, but the hubs are awful. I've ended up having my pair of 404s rebuilt onto Tune hubs, the Zipp ones were so awful.