I'm in the minority in that I read The Mermaid Chair before I read The Secret Life of Bees. I found things to love in both books. I feel some of Lily in me because I lost my mom 20 years ago. I didn't spend my childhood without a mother, but I've spent most of my adult life without one. OTOH, I feel Jessie IS me, but for some (ahem) details. The Mermaid Chair may well be easier to appreciate if you're in your 40s or older.
I don't believe I've ever read anyone whose writing cuts at my heart the way Sue Monk Kidd's can. Sometimes when I read books I think, "I just don't get it," or they seem to be just stories. Her books hit me where I live.