Are ceramic knife sharpeners any good?

Related questions

1. What is a good knife sharpener?
2. What does having a strop mean?
3. Do electric knife sharpeners work well?
4. What makes a knife sharp?
5. Do knife sharpening steels wear out?
6. Does stropping sharpen a razor?
7. Do electric knife sharpeners ruin knives?
8. What Grit is a strop?
9. Does cutting plastic dull knives?
10. What is the best thing to sharpen a knife with?

Tags

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2. #short
3. #block
4. #blade
5. #other
6. #others
7. #great
8. #while
9. #angle
10. #manual
11. #require
12. #likely
13. #knives
14. #degree
15. #blades
16. #skill
17. #sharpened
18. #sharpening