Tronto is definitely doing something cool. I am really enjoying my care ethics readings because they are challenging almost all my base assumptions on the nature of morality and politics. However, I am still unconvinced that care ethics is going to deliver what I need from an ethical theory - unsurprisingly I find more purchase with Aristotle. Tronto would perhaps just repeat from this book "the kind of metaethical theory that we find convincing reveals a great deal about who we are, what moral problems we think are significant, and how we view the world" (149). And I think she's probably right.
My only real beef with this book is twofold: first, her notion of care seems too small, as she focuses primarily on the role of the care-giver and not the receiver as well as not fleshing out the possibility of a network of care; and second, I think she misread Smith. I've read more on Smith's ethical thought the past six months than I ever thought I would, but in doing so I have found a profoundly interesting and robust ethical view. Tronto's view does not match what I think of Smith. However, I'll probably just write a paper about it and not bore everyone on Goodreads about it.
TLDR: Interesting stuff, but I remain unconvinced. If you are curious about care ethics, this is a good read. ;)