Increased detail and musical at the same time. Some cords give up pace and rythm for the sake of detail.

Lean tone. Increased detail may be the result more lean sound though. Price tag makes its value questionable except in the top highest end systems costing ten of thousands of dollars, where a "mere" $1500 cord can be considered a reasonable investment.

tweaks such as powercords, and etc, really depend on 2 things, matching,(a cord that sounds good on one system may not sound good at the other), system sensitivity(some systems are unaffected by cable upgrades, that means speaker cables and interconnects) and system resolution(if you're not using high resolution high fidelity equipment, also don't expect to hear any differences)

Having said that, I did compare the cord with a stock one at a shop and the differences were quite noticable. Noticable enough that 2 people can hear the same difference.

Pro and cons are already mentioned above.