I haven't read it, but I did speak to a couple of FoLCs about it shortly after it came out.
Personally, I'm not especially interested in reading it, but I just might end up doing so anyway. If I run across a copy in the local library or something.
FYI, for those who said they weren't interested in the actors' personal lives... It's my understanding that it's not an autobiography. It's more Teri's outlook. Her personal philosophies. Her thoughts on motherhood, abuse, how to be a strong independent woman, etc. It's based on personal experiences, but it's presented as life lessons, if that makes sense.
For example, the title of the book refers to her thoughts on motherhood. If Mom makes toast for the family and one of the slices ends up burnt, there's kind of an expectation/tradition/tendency for her to take the burnt slice, giving the good stuff to the rest of the family. Teri thinks Mom deserves better, that she should learn to put herself first sometimes, etc.
At least, that's my secondhand understanding of it all.
For those interested, the book has been discussed in a few threads over in OT:
Dean and Teri together (when he showed up at a book signing)
Wanda Detroit meets Teri Hatcher (when WandaD went to a book signing)
Burnt Toast (a discussion of the book itself)
Burnt Toast (further discussion of the book)