I'm on my second Wipperman..
I've gone through two Campy chains, a Wipperman stainless, a Mavic Nickel (avoid them) and I'm on my second Wipperman Stainless. I think the Campy chains run just a tad bit smoother and shift just a little more precisley than the Wippermans. The Mavic chain only lasted 700 miles. The Wipperman is easy to install, you can pull it off anytime for cleaning, the Connex link is reuseable so you can carry a spare on your rides. My first Wipperman lasted 4200 miles. The Wipperman costs more than the Campy, but it comes with a link and it's lasts longer, so you have to compute that in with the price.
However-(there is always a however) I tried a Wipperman on my Shimano D.A. bike and it did not work for beans, I pulled it off and replaced it with a D.A. chain, which works great.