Good:

• Includes wine notes
• Includes smart recipe lists
• Attractive recipe view with photo

Bad:

• Number of serves only scalable in multiples
• Apart from manually creating lists or keywords, doesn't seem to classify recipes by meal
• Awkward shopping list: not obvious how to add recipes, no iPod export
• Metric conversions?
• No weekly meal planner

The programs I tested, roughly in order of preference were:

1. Connoisseur 1.1.7 (great interface)
2. A Cook's Books 0.9.19 (feature rich)
3. Shop'NCook 3.1 (includes nutritional database)
4. Organized Gourmet 1.2 (calendar based meal planning)
5. MacGourmet 1.1.7 (attractive interface, includes wine notes)
6. iCuistot 1.1.1 (includes nutritional database — sort of)
7. Kitchen 1.0 (simple interface)
8. Yum 0.7.8 (simple recipe manager)
9. Measuring Cup 1.1.1 (simple interface)
10. CookWare Deluxe 2.1 (includes a very basic meal planner)
11. The Computer Cookbook 3.1

Note: There are many others that I didn't test at all because they looked less promising, based on their descriptions and other people's reviews. There is one commercial product (TheRecipeManager) I refuse to test because of the developer's crazy policy of buy before you try. While I have tried to give a fair and honest appraisal of each product, I don't pretend that each review is exhaustive or totally without error. If I have overlooked any feature, it's possibly an indication that the feature was difficult to find or unintuitive to use.