I can only add that a friend of mine bought the Vita Comp 1.5 yrs. ago and loves it. She has made some good progress on hill climbing and I have taken her up one of our more notable climbs in the area on that bike (Oak Hill). Though she was ready to kill me, the bike and her made it...
She has had a few little shifting issues on the Comp, each time the LBS adjusted it and it then behaves. But, it has made her think about getting either a more traditional road bike that is a bit more upright than some, or upgrading her components. This is from a person who said she would never a) use clipless pedal (she does) and B) get a bike with dropped bars (she is thinking about it). The Vita Comp has really hooked her!