PREHEAT oven to 350°F. Beat cream cheese, sugar and vanilla in large bowl with electric mixer on medium speed until well blended. Add eggs; mix just until blended. Stir in 3/4 cup of the chopped toffee bars.
POUR into crust. Sprinkle with remaining chopped toffee bars.
BAKE 35 to 40 minutes or until center is almost set. Cool. Refrigerate 3 hours or overnight. Store leftover cheesecake in refrigerator.