This is a review of the quality of this edition in particular, not of Kim as a work of literature.
Introductory notes and a general timeline of Kipling's era, and a few other extras, but no illustrations. Proper quotes, italics, dashes, but often open quotes are used for closed quotes or apostrophes, and closed quotes for open quotes. The unusual character ' is included as an image rather than as a character, and so does not scale with the other letters. Occasional OCR errors (e.g. zero for capital O) and incorrect extra paragraph breaks. The footnotes in the introduction are not hyperlinked. The footnotes/glossary entries in the main text of the book (of which there are a large number) are hyperlinked, with link numbers rather than linking directly from the word. A nicely linked table of contents. I would prefer it if the book opened at the start of the story, but that's a minor quibble. The text gives a blank line between each paragraph, as well as indenting the first line, and some of the extras could be formatted a little better.
Overall, a reasonable edition, let down by poor proofing of the text. It does have copious hyperlinked glossary entries, which is a plus.
If you're looking for a Kindle edition of Kim, don't just search for "Kim". That only finds a few of the many editions. Search for "Kim Kipling" (without the quotes) to find the many editions available. And also look for my review "Kindle Edition Choice is critical" for a review of all the available UK editions as of January 2012. I can't give a live link to the mass review here, but its web address is: http://www.amazon.co.uk/review/R352D63HO69Y03/