How is that a problem? I thought that NIssan had stopped all that silly warranty-void-if-TCS-off stuff on the cars now?
Nissan have no problems with switching off the TCS on the R35, that is what the switch on the dash is for.
The R35 has 3 options for TCS, full on, race, and full off.
The original Nissan issues was the use of launch control on the earlier cars.
The black box is a bit of a nuisance as it records even if you sneeze.
Back on topic, for normal road use the 350Z TCS works fine but can be intrusive if you enjoy your spirited driving, however that can all be controlled with your right foot.
I used to practice in the 350TT driving round Knockhill lap after lap with the TCS switched on, as it was the ideal way to perfect a smooth lap endeavoring to get a fast lap with no TCS interferance.
Then with TCS switched off I would put all I learned with the TCS on into practice to get the perfect lap.
So as well as being a driving aid for normal road use, it also has other helpful uses.
Alex.