Not only does this add almost 45 extra minutes, it also removes a couple of scenes that I was never really happy with. Notably for me are 2 scenes that were not in the book; the Baron wanting to spit on lady Jessica and also the spulling of the heart plug and the introduction of scenes that are a lot more sensible (Keines spiitting in welcome).
What you have left is a superb film. I don't think anyone realised just what a great job David Lynch had done to produce a single movie from the Novel until the mini series tried it as well over 4hours.
Now the movie is just under 3 hours, feels cleaner, sharper with more pinpoint sound.