I love it ... it's always "no issues" until it snaps and cracks your cases I ran a 530EK on a turbo busa and stretched the **** outta it in 3K miles. Same with a 530RK. The D.I.D. held up better but still had to be replaced every 8-10K miles. Also had issues with too much stretch running a 520RK on a basically stock '04 1kRR.

For racing, where you'll be replacing a chain on a faster schedule and you need to shed every ounce possible a 520 conversion makes sense. But on the street you'll never reap the benefits of a marginally lighter chain.