I bought the z85 because in 2012 it was $200 cheaper than the Giant Defy, but just as comfortable with better components. It also had better components than the Caad8 and Alez that I considered, but in my very obese and un-flexible condition at the time, I didn't even consider those bikes after test riding them because they weren't as comfortable as the z85 or Defy. I'm still happy with everything but the crank set on it. The cheap FSA Viero chain rings warp often.