I am a HUGE fan of Batman Begins and I am one to believe The Dark Knight is all of what the first one was and more!!! I absolutely loved it! This is the first movie in a long time to surpass my expectations when my expectations where already set pretty high. There are very miner flaws here and there (no movie can escape minor flaws) but they do not jeopardize the overall grandeur of the experience. I usually don't get giddy over movies, but I'm still talking about it like a school girl on her first date. (And I'm no girl, btw)
I managed to see Batman Begins at the box office 8 times. I believe I will be catching The Dark Knight more than that easily. I already have one showing under my belt and hunger for more. It's that good. Not to mention I'll be catching as many IMAX showings as I can since they have four key scenes shot with the 70mm IMAX format, 20mins all together. If you want to catch the whole experience Nolen was going for you need to see it in IMAX.
Heath Ledger is damn good as the Joker, a more darker version of the Joker found in the darker series of the comics, a Joker I much prefer. I forgot it was Ledger for the majority of the film, which means the character shined through. I have to say he takes the cake in the movie, even over Bale, which I wasn't expecting. Ledger will be missed.
I will not give any spoilers here. I'm too busy waiting to see it again, anyway. lol