I just broke a spoke on my rear Topolino C19 a week ago 150 miles into a double century. I was riding along on a flat stretch of smooth road and <PWANNGGG!> One of the non-drive side spokes sheared off the screw end where it goes into the rim. The spoke folded over and thwapped on my chainstay as the wheel turned until I stopped.
It threw the wheel far enough out of true that it still rubbed the pads with the rear brake wide open. I wobbled another 5 miles on the wheel until I found a support vehicle with a Campy 10 wheel that I could swap out for my D/A 10 wheel.
I've had the wheels since January and put about 4500 miles on them so far. I've been mostly happy with them. The rear hub felt like it was loosening up over time. When I'd be off the bike I could get it to move side-to-side giving it a little shake with my hand. My stock Bontrager wheels never did that.
I'm 6'5" and weigh 185. I don't race in crits and I've never crashed on the Topo wheels. I talked to Topolino and I'm sending the wheel back to them today so that they can replace the whole non-drive side and determine if I need to pay for it (~$100) or if they'll replace it under warranty. Like I said, I'm pretty happy with them so far but the only wheels I have to compare them against are my stock Bontrager Race Lite wheels.
I'm getting Campy Neutrons on my new bike and the Topolinos will likely stay on the old (rain) bike.