I use Campag factory wheels almost exclusively - Khamsins and Ventosm mainly, though I have used minimal spoke count Zondas as well, I decided they might be pushing the envelope a bit far.
First thing to note is that when I got my first set I weighed 121Kg, and they went on a bike being used year round to commute into East London, including some bad tarmac sections, and some cobbles. with panniers / laptop etc on top of my sprightly weight. After about 6 months of reliable use, I was reading the instructions which I hadn't actually opened till then (as you do before you throw them away...), and found the bit where it says "max weight 82Kg"...
Well, as I'd had no issues, I kept on using them. This was 2006/7 ish, bought them in 2005/6 ish. Not entirely sure.
Anyhoo, they served reliable for tens of thousands of miles and I acquired a coupe more similar sets (the Khamsins are identical to the original 3G Vento). My original back wheel is currently my turbo wheel, having run through the braking track with crapped up brake blocks across multiple winter commutes, It must have done 20-30,000 km commuting and riding in all weathers, and has done another 4 winters on the turbo.
Never had a problem with any of them, not even trued them. I believe they come in both Campag and Shimano fittings, and would highly recommend them.
Mind you I'm still racing on 1995 era deep rim Alloy Zondas...