Review Detail

Being a big fan of the original movie, it was really cool to see all of these new parts integrated into the film. Not all of them were improvements, though. Many of the deleted scenes were deleted for a reason, and while I wouldn't normally criticise an extended edition for this, since parts of the film were editorialised according to the editor's tastes I think it's fair to treat it like an ordinary edit.
As for the deleted scenes themselves, it's clear that effort was put in to make them fit with the rest of the movie, but many of them were still VERY rough. A lot of them had quieter audio than the rest of the movie, meaning that I had to keep turning the volume up and down to hear the dialogue, and some of them clearly didn't fit visually or match the timing of the scene.
In a movie where the editing is so important, this was very noticeable and impacted the experience a lot.
Some deleted scenes were very well inserted to the point where I wouldn't know they were deleted if I wasn't so familiar with the movie, but compared to the total number of edits, a pretty large percentage of them are what I would consider "bad".
If you know the movie well, and want to see the new content, you'll definitely get a kick out of this, but I wouldn't recommend it to first time viewers and I don't think I'll be coming back to this version.