It's a spectacular site. She wrote all the text, to which makes a big difference. Her prose style is amateur-esque and loose, but her wit and good humor are impleccable. No one could relay the information like she has.
My favorite tidbit, besides that locked door: Ginny Weasley's full name is Ginerva not Virgina. She was always one of my favorite characters - particularly after OOTP - so it was nice to see something a little less mundane.