I don’t really have any notes on the AP sound, as such, and it’s been two years since I used them in a system, but I felt like they were very good for the price (I also had a good deal on them). The cable upgrade came with new speakers and amp … an entirely new system … so there wasn’t much of a direct comparison on the same equipment. But I would say that the WyWires Platinum (which retails at 3x the price of the AP cable, since discontinued or updated), offered more detail, space and clarity than I had been hearing from the AP cables – even before being fully broken in. I don’t know if they have a trial period, but they do sell direct and have been running a 40% off sale, so I’ve been picking up a power cord here and a USB cable there, and so on. Cosmetically and ergonomically they are very appealing as they are relatively svelte for a high-end cable and are very tastefully color-coded.