One of the incidental benefits of the indexing method of my book is how it gives users insight into the phonetic patterns of Chinese characters. 

Consider this little extract from the dual component index:

The sounds for these related characters are all very similar, but all a little different. Having seen this pattern helps readers to understand the range and variation of this phonetic pattern. The next time they see the same phonetic element they will have advance knowledge of what the likely pronunciation will be.

Here is a similar grouping:

You can see the consistency in the pronunciation and the variation in tone of these related characters. I find this gives real insight into Chinese phonetics.

Finally, here is another grouping by the phonetic element:

Again, you can see the consistency and the exceptions in the pronunciation of the phonetic element. 

There are, of course, hundreds of examples of this in the book, and only in this book.