I would indeed say your experience may vary. I could not stand the HiFi Tuning fuses, but I had been using the IsoCleans for the last year.
Greg7, I have found no instance where an IsoClean does not improve the sound of a component greatly. This includes the five fuses in my Esoteric X-01. In the case of the IsoCleans and the HiFis, you have to get the polarity right. Put the fuse in one way, listen, and then reverse it and listen again. Choose the better sound. HiFi claim they are not directional, but they are.
Greg7, I have found no instance where an IsoClean does not improve the sound of a component greatly. This includes the five fuses in my Esoteric X-01. In the case of the IsoCleans and the HiFis, you have to get the polarity right. Put the fuse in one way, listen, and then reverse it and listen again. Choose the better sound. HiFi claim they are not directional, but they are.