I watched MONSTER HOUSE last night, and found it to be one of the best BD's yet. There was some very faint banding in all black scenes(the first time you see the inside of the house), and every once in awhile reds would be just a tad unstable. But nothing major, this is one of the most satisfying Blu-Ray releases so far(and it doesn't hurt that I loved the movie!).
PS This is on the Samsung with the update. Perhaps the few minor problems are fixed on the Panny.