DH and I are wordperfect in large chunks of EB from our own childhoods (he had older sisters, and a rather dubious crush on Darrell Rivers from Malory Towers at a tender age!) and still have lots of old editions lying around the house.
I'm not sure large numbers of today's children are likely to enjoy EB - while I read them with nostalgia and enjoyment (and utter horror at the racist, classist, sexist, xenophobic stereotyping, though I will acknowledge that that was always clear to me as a child, too), it's her inability to write character that strikes me now. Her plots require her to keep putting sets of four children plus pet/pets into adventurous situations, but Julian, Anne, Dick and George (Famous Five) are pretty much indistinguishable from Philip, Lucy-Ann, Dinah and Jack (the 'Adventure' books), or Andy, Tom and the twins (can't remember the titles -the ones where they get marooned on an island in a storm and catch Nazi submarines), or Jack, Mike, Peggy and Nora (the 'Secret' books). The Secret Seven are completely indistinguishable from one another, apart from the naughty cousin Susie, and Jo, Bessie and Fanny in the Faraway Tree books ditto. The O'Sullivan twins are the same girl, as far as I can see.
I can barely remember who the other Find-Outers were apart from Fatty, dopey little Bets, and the comic relief working-class sidekick Ern!
(Though on the 'Fatty' issue, perhaps interesting to have the group effortlessly dominated by the fat child, who is clever, quick-thinking and a natural leader...? I mean, it sort of mitigates a cruel nickname...?)