They run smooth, strong and solid as a front rim.
Ripped a spoke through my back one and it split along the sidewall.
They are great and lasted me nearly a year. I kept my rim trued and spokes tight but my riding surpassed the rim. The front had zero faults but the rear couldn't handle the hammering. Ripped a spoke through and it cracked along the sidewall. Run it up front and you'll be fine, well worth the price though!