I've read it twice...one six years ago, and again last winter. It's truly excellent, but a few words of caution:
1. It's more specific than general...everything is within the context of the French invasion of Russia in the early 1800s. If that's not your cup of tea, there's an awful lot of period detail that will probably bore you to tears.
2. It's an epic in every sense of the word. Tons of locations, events and characters (My God, there are so many characters) that all intertwine in various ways. YMMV, but for me it's not the kind of book to read in 15 or 30 minute spurts - it's just too easy to lose track of what's going on. If you're the "sit down and read for an hour or more at a time" kind of reader, you'll probably be more satisfied (if nothing else, it's good pipe smokin' reading).
I wouldn't call it the greatest book I'd ever read, but I can understand why some might. I certainly don't regret the time I've put into it.