Jesse Gus Allenwrote a review of Absolute Black SRAM Oval Boost148 Direct Mount Traction Chainring on July 24, 2019
Familiarity: I've put it through the wringer
Pedalling with this is noticeably smoother than with a standard ring, not by a huge amount but it's definitely a nice little boost. I notice it the most at the top of the stroke where human biomechanics makes us the weakest. I run a 32 tooth but at this point the oval shape makes it feel like a 30t so it's easier to push through the hardest part of the stroke. I find this feeling to be very nice and improves my pedal efficiency.
All in all, I'm totally sold on ovals and will never be going back to a traditional ring!