I've had a set for nearly 3 years. There are pluses and minuses:
Pluses: The flats and reliefs near the brifters are the best feature.
They look trick
Minuses: The internal cable routing adds friction which degrades shifting some compared to conventional routing. I have Campy Record on this bike and it doesn't shift as positively as well as the Campy Daytona on my rain bike.
I had some challenges getting the angle (tip) of the bars right such that the flats felt normal. A related issue is that there is very little bar after the anatomic bend in the drops thus when in the drops, you can hit your forearms on the top section (the back of the flats). It makes for a tradeoff on overall tip.
You'll have to do something special if you want to mount a computer or similar on the bars. There isn't enough regular round section next to the stem. I have some shims under the inside to allow the computer to be mounted. Stem mount would be much better.
If you're running Shimano, you'll have a tough time getting the brifters up as high as seems fashionable these days as the reliefs dictate the position of the brifters. It's not too bad with Campy but if you try to change this by tipping the bars, we're back to the problem mentioned above.