Of 20 points, 10 are awarded for food, five for service, three for ambience, two for wow factor.

12 Reasonable
13 Solid and satisfactory
14 Good
15 Very good (indicative of one hat)
16 Seriously good (indicative of two hats)
17 Great (indicative of two hats)
18 Excellent (indicative of three hats)
19 Outstanding (indicative of three hats)
20 The best of the best (indicative of three hats)

Restaurants are reviewed again for the Good Food Guides and scores may vary.