I'd had this one on my TBR list for ages. I love Justine's blog, and the premise of this story is just fantastic. If I got to have a fairy, I'd definitely go with the sleep fairy (no matter how much sleep you get you feel like you had 8 hours - bliss!).
I finally downloaded the audiobook, and it is the perfect book to listen too. Kate Atkinson does an amazing job. I'm not sure I'd have liked the book as much if I'd read it. Hearing the story, made me feel more connected to Charlie, and it made her longing to be rid of her fairy much easier to understand (Living in DC a parking fairy doesn't sound too bad!). Listening made it far easier to get into the made up words too. The tone Kate spoke them in really helped.
The main story is, the classic, be careful what you wish for. I liked the other themes touched on too, especially the insulated state most of us live in, believing are country or city is the centre of the universe.
How To Ditch Your Fairy is a fun read and I really enjoyed it. I'll certainly being picking up more books by Justine. I'm curious to see if they all feature made up language. I have this image of her and Scott Westerfeld (author of Uglies and Leviathan, which also feature made up words) saying their wedding vows in a completely fictional language!