Andres Munerawrote a review of Absolute Black SRAM CX Oval Direct Mount Chainring on December 19, 2018
My first Oval chainring. I actually got the five bolt and installed it on my Rival cranks. I found the installation to be easy, just don't over torque or you will 100% snap the bolts.
Did I notice a ride difference? Yes and no, I've been riding bikes for over 15 years and I assume I have a good pedaling stroke. If I pay attention I do feel the increase in efficiency.