I'm familiar with several Brothers Grimm stories, but I'd also never sat down and read a bunch of them in a collection. Maybe it's just nostalgia, but a lot of the less famous ones don't really stand out to me.
I was also hoping for more from Philip Pullman - we got little paragraphs from him at the end of each tale, but I wanted more on why he chose the ones he did. He also had several notes saying he didn't like certain stories or would add to certain stories or tell them different - I would have actually like to have seen those changes with a note about how the original went. Instead, this collection just seem like tellings mostly straight from the source. I'm glad I've read them, but it's hardly a "New English Version."