I would say the movie is within the Top 10 of all time, although which movie would join it in the Top 10 would be a whole other debate. I give it a solid 4 out of 5 stars.
Not surprisingly, Vits gave it a middle of the road score, but I've learned to expect that from him and classic movies. If by going by the 10 point scale (which I don't), it shouldn't be less than 8 just because the story is "not interesting" (which it does get dull after a while, but not enough to shave three whole points off).
But why is "Sunset Blvd" considered the best movie of all time by the HeadRazz? Just because it mocks Hollywood?