The new book comes out July 16th (Saturday) and I'll be reading it (just ordered it on Amazon). However, the 4th movie just had a test screening.
And the reviews were great.
As always, it seemed the actors were spot on, Mad-Eye Moody and Voldemort were great. The same problems came up as with the other ones. The pacing of the film was a bit off and if you didn't know the book, you might have problems following the movie. Also, because the 4th book is so large, a bunch of stuff had to get cut out, so book purists may have a problem. But this was a test screening, so the pacing and stuff can be corrected.