I can remember just absolutely adoring these books as a child. But I'd completely forgotten about them (and then unfortunately mistaken them for the [b:Amelia Bedelia|774001|Amelia Bedelia|Peggy Parish|http://d.gr-assets.com/books/1353400157s/774001.jpg|888927] books...) until I found this in a bookstore yesterday.
I remember being so fascinated by Mrs. Piggle-Wiggle's upside-down house with the slidey floors and the dress-up clothes and the pony and wishing so badly I could be one of the children who got to visit her.
It's curious how different the experience of reading this as an adult was. It almost makes me sad how many of the things I remember thinking were just AMAZING now came across to me as silly or ridiculous. For example, convincing children that doing dishes or making beds is fun by having them pretend that they'll be punished by a wicked witch or evil queen if they don't seems rather counter-productive now, but the dress-up parts were all I focused on back then.
I'll definitely recommend this to my students; I have several who might be just as delighted by it as I was at their age.