This final book is the best in the series. Rowling does a great job of closing up the series by explaining more about Albus Dumbledore's past and how it entwines with the "Deathly Hallows". "Death Hallows" meaning is explained also. I will not ruin the book for you by going into what it is because it actually is a main plot in this book.
The lovable characters: Hermoine, Ron, Fred & George, the whole Weasley family and the main Auroras are also in this book. The romance between Hermoine and Ron blossoms and Harry does get to see Ginny before he sets off on his destiny. A lot of characters that we know and love do die in this ending but other characters are introduced.