This is a great book - indeed, a great series of books. The adventure of Liriel is as, if not more than, interesting and exciting than Drizzt's adventures. It delves more into drow psychology, shows more of the post-war decadence and decay and shows power struggles in the drow society. This book covers no less than 3 drow religions (in case you were wondering about other drow gods), as well as being a form of light introduction to rune magic.
All in all, a great book and a must read for Salvatore fans.