I hesitated about getting this edition because some of the reviewers here mention difficult navigation but am now extremely glad I bought it. Yes, as others have noted, it has a very long, detailed, active Table of Contents which takes a lot of time to page all the way through. It is fine if you are looking for something near the beginning, like Morning Prayer, but cumbersome for anything toward the middle or end. However, there are other easy ways to navigate through the book.
First, if you use Kindle's search feature and search for the word "quick" (without the quotes), you will see numerous Quick Navigation indexes and can choose any you want: Page Numbers, Collects, Psalms, Canticles, Prefaces, Litanies, Sentences of Scripture, Confessions of Sins, Other Prayers, or Common Services. Each is an active index. If you go to the Psalms index, for example, you can select the number of any psalm and immediately arrive at it. I have bookmarked several of these indexes and can now get to them in a snap.
Another navigation option is searching for page numbers. The numbers in this Kindle edition are coordinated with those in the current standard edition. Thus, if you have access to a paper edition of the BCP but would rather read on the Kindle where you can adjust the font to a comfortable size, you can note the page number of any often-visited page in your paper edition and then search for it with Kindle's search feature. For example, Prayers and Thanksgivings starts on page 810. If you search for "p. 810"(without the quotes and with a space after the period), you arrive there in a jiffy. (I have found it is quicker to enter numbers by simultaneously pressing ALT and the appropriate letter on the top row of the Kindle keyboard than by opening the "Sym" page.) You can also choose the Quick Navigation index for Page Numbers on the Kindle and select any number to go to that page, though this particular index is a bit long because the BCP has more than 900 pages. An additional interesting feature is that page numbers, formatted in light gray, are sprinkled throughout the text, so you can see what page you are on. I have bookmarked the pages I often visit. Navigation to them is now simple.
All in all, this edition of The Book of Common Prayer quickly becomes easy and comfortable to navigate. While using the Kindle during a church service might be distracting, this edition is very nice indeed for prayer at home or while traveling. I am definitely glad I have it!