I've been curious about these as well. They apparently are extremely well made. If you read the users comments, they were all pleased with how well machined these things were. The interesting thing was that I did not find one user comment that said anything about what it did for the sound of the system--I'm sure I didn't read all the comments, but I read quite a few--thought it was odd that an item designed as a sonic tweak didn't have one user comment about "how great this gizmo made my system sound".
