I've been beating up a set of these for 3 years.  

Mine were built with CX-Rays spokes.  

I've broken two drive side spokes over the years, which then punctured the thin rim tape and caused a flat that could only be fixed by a tube.

I just rebuilt the rear with DT spokes.  In my experience they hold up better long term.

Otherwise they've been great.  

I've had multiple rim to rock hits that cut tires, but the rims are crack free.

I'm excited to hear about the Spec Control Carbon long term review...