There's a lot of pressure from the Conciliars who insist upon making everything related to salvation subjective, i.e. ex opere operantis, and these are the same types that, following the Protestant heresies, attempt to take away the ex opere operato efficacy of the Sacraments. So they declare the efficacy of the Holy Scapular and the First Saturday devotions to derive only from your subjective adherence thereto rather than on something objective guaranteed by God and Our Lady. I call hogwash. These are the same types that when accused of "worshipping" Our Lady will backtrack and start hemming and hawing to the point of reducing Our Lady to the same level as any other saint.
If you've successfully completed what Our Lady requested, congratulations ... you will be saved. God will not allow her to be dishonored by someone at the Last Judgment accusing His Mother ... "you promised this but lied". Nor does God play technicalities. "Aha! Since I knew that you would be lost, I made it so that you didn't notice having skipped one Hail Mary during the Rosary, so technically you didn't fulfill the conditions. Now off to Hell with you." What kind of monster do people think God is? It's blasphemous to think in these terms. That would be the exact legalism that Our Lord condemned in the Pharisees. PS: this is why I reject as absurd +Sanborn's assertion that adding the Fatima prayer during the Rosary negates the indulgence. Utterly absurd. That's Pharisaical thinking that, unfortunately, some of the dogmatic SVs have slid at least partly into. Does adding that prayer SUBSTANTIALLY alter the Holy Rosary, where it's really no longer the Rosary? Of course not.