I poured Caltex CVTF in my ex car Vitz, and drove for around 20,000 Kms, before selling it, and nothing bad happened. Caltex CVTF met / exceed the Toyota Genuine CVTF-FE and TC criteria both, and came at almost 1/2 the price of Toyota genuine CVTF-FE.
If it meets / exceeds the Nissan NS-3 criteria, then IMO, you may go for it and no harm in using it.
I can say with confidence that if your mechanic does everything properly, and does not mess up with anything, then Ravenol NS-3 will not bring any damage to the CVT. GOD Forbid, if something goes wrong, then Ravenol NS-3 will not be the culprit, rather poor workmanship / ignorance by the mechanic.
I hope, all above helps and guides. Thank you.