I just upgraded to this about 5 weeks ago from a hybrid & wow what an amazing difference. I keep telling people that I no longer ride to work I GLIDE to work. This bike is smooth & sleek & sexy. Still a little heavy compared to a full carbon frame but that's the trade off you get for a smaller price tag. All in all I'm very happy with it & I'm always finding excuses to go for a ride.
Weaknesses: the carbon fibre parts (top tube & seat stays) are weak
This bike lasted all of six months. I took a slight tumble on it (rounding a corner in the wet back wheel slipped out and I fell to the road & slid for 5m a real nothing fall). Long story short the left seat stay snapped frame was ruined. apart from that it was a comfortable ride. Long geometery gave it some flex for comfort on those really long rides.