I rented this one myself and yes- it was actually a VAST improvement over the first two theatrical movies. I really enjoyed it pretty well. Honestly, I hated what was done to the cartoon in the first movie [particularly with Scrappy Doo- that was just wrong.] The second movie was a bit more tolerable- I enjoyed seeing the live action version of all those classic villians.
But there was still stuff in that one I didn't like either.
This new movie was a lot more respectful of and faithful to the Scooby Doo cartoons. And I love the bit at the end with the live action enactment of opening credit scenes!