I am thinking of this crankset for a new build using an otherwise 7900 drivetrain. I would like to hear other people's experience with this crankset. Is it really stiff? Any creaking issues? What rings perform well and look good on it?

I had a pair in BB30 format on a Jamis Xenith SL. I was very happy with them. I weight 175ish and had no perceptable flex. They creaked because of the BB30 bottom bracket. The attention to detail, fit and finish were top notch. I used the black extralite chain rings for an absolutely great looking combo. I received lots of complements from other riders in my group. Overall, very happy with them. When one considers weight and cost they are an excellent option for a weight weenie bike.