Title: Shaken, Not Stirred

Rating: 4/5

The official rules:
 The digits 1 through 9 appear in each row and each column exactly once.
 Digits in each shaded region must add to the indicated sum (denoted by +) or multiply to the indicated product (denoted by *).
 Squares with multiple colors contain a number that’s used in the sum/product for adjacent regions of each of those colors.
 Remember: numbers can repeat within a shaded region if that repetition doesn't violate the first rule.