After running my first half-marathon I was hobbled for six months with achilles tendonitis that required a trip to a sports medicine doctor and multiple physical therapy sessions.
The 8S might not have the deep integration, and extra amplification that the 8X sports, but the Doctor's touch is still present here, meaning that extra musical "oomph" is also on offer.
But how many clean athletes pay a consulting doctor who was banned from sports in his native country, Italy (and recently from all Olympic sports in all countries)?