I've been riding some AC 350 Sprints for a few months and love them where it counts, in the mountains. They climb as advertised, being very light weight and very stiff so they take all your effort and put it to the pavement. They also sprint well, with good acceleration. The pair I got also weighed less than the advertised weight (on certified scales)
In the flats and descending, they take a little more work to keep at speed. Maybe less inertia or something.
I weigh in around 162 lbs or so (depending on how many burritos I eat in a week), and have had no durability issues yet. I did get the sapim spokes so that might help the durabilty.