I absolutly think that the movie sucks!!! The definition of how it was it's like this: 2 hours of bad romantic almost comedy and 30 minutes of a bizare fail try of Harry Potter. Just the fact that they cut off the part of the fight... It was, for me, like the people that made the script note that the movie was getting too long and decided to make the most insesible final for an adaptation. Another thing is that the argument couldn't get any moment of real action and that Harry wasn't interest about the half blood prince... Think for a moment how could it be when in the book Harry have the doubt and wanna know... And finally, to finish, the dead of Dumbledore was ugly, no fight, no "fatal destiny" moment and they didn´t perform the funeral... so WTF with this movie... Weel, I sincerly think that it's the worst adaptation of the six, and maybe it's because Harry Potter as a comercial product is declining its value, but the didn't had the right to made that...
Of course the book it's better...but not when you wacht the movie to compare. When you do that you know the movie as adaptation sucks...