I'll weigh in on the opposite side of most posts here. I've ridden Campy exclusively since 1995. All levels from Mirage (remember that one) to SR EPS. When EPS became available, my LBS ordered one for me. Unfortunately, I couldn't find a C59 frame so put it on a Wilier Cento Uno. I rode the bike almost every day the first summer because I liked the bike and the shifting was OK. I found that I had a tendency to overshift on the rear the first few shifts after riding mechanical but was able to correct myself within 15-20 km.
So, why do I now favour mechanical? Battery life. I put the WIlier away in September 2012 and rode various Colnagos until spring. When the weather and roads finally improved here in June, I took the Wilier for a ride. Battery had been charged about a month before and the bike had gone for almost three months the previous year without a charge so off I went. Of course, half way through the ride, the battery went flat. Painful ride home, charged the battery, left the bike a week, took it off the hook and the battery was flat. Charged it again, got half way through a ride. In late August, I took the bike to my LBS (not really Campy specialists but a really big shop and the mechanic I use deals directly with Campy). Unfortunately, my mechanic left the shop after getting Campy to agree to give me a new battery ... when they had one in stock. Nothing happened there. Shop now says they can't find anything wrong with the battery so I have a useless $10,000 bike sitting in my closet.
Mechanical may not always work but it can be fixed by a lot of people.
Oh, and the Di2 Pinarello that I bought in 2010, crashed the second ride and couldn't face any more is still going strong.
i suggest you get a new bike shop / get to work on it yourself.not all mechanics like the Campy way of doing things...
i have record 11, super record 11 and super record eps. eps definitely the bomb from a function point of view - just effortless and no issues. mechanical have given me very little grieve besides the odd cable adjustment from time to time ( wear and tear )