VTL Super Balanced Feature Option


Does anyone have any experience with VTL's Super Balanced feature option vs. their normal balanced connections? On their amplifiers, what difference in sound quality does the Super Balanced feature provide? How much of an improvement is provided by the Super Balanced feature? (barefly discernible, noticeable but not that big of a deal, huge, etc.?) How worthwhile is the Super Balanced feature? Any insights would be most appreciated. Thanks
I would also like hear the thoughts of others about this upgrade. If you have had this upgrade performed on your amplifier, I'd like to hear your thoughts.

For my MB250s, VTL would like $1000.

Much appreciated in advance.