TWL makes a very good point regarding the cautionary break-in period. Something I don't believe is much of an issue with other racking systems that adhere to the isolation/dampening aka de-coupling methodology.
However, in my experience with 'resonance energy transfer' styled racking systems, the initial sonic improvements are typically marginal at best. It is only after the initial 7 to 10 day mechanical break-in period that the sonic improvements become quite substantial. And sonic improvements can continue well beyond the first 7 - 10 days.
This mechanincal break-in period should imply that performance comparisons between racking systems/platforms really needs to be a rather long and painstaking effort.
Even moving a fully broken-in coupling-styled racking system to a different location (even 2 inches) can take 4 days or more for break-in to occur again.
In other words, if one were to compare the performance of say a Sistrum rack to that of a Grand Prix Monaco rack and if each rack is in place for only a day or so, then the comparison testing is really rather meaningless and certainly inconclusive.
-IMO