I used the Rotor oval rings for awhile and I liked them meaning they felt good. I quit using them because of problems shifting the chainrings, power readings slightly off and different from my track bike. In reality, it took a couple of laps on the track to adjust from the oval rings but my thinking was why train on oval rings on the road with the goal of racing on the track.

I would not reject them out of hand and I think they are athlete specific. And of course, if you think you are better off with them than without them...you are.