The only part I didn't like was when Miles was showing the holocube of his family to Jin, and there didn't seem to be any pictures of Nikki on it. Really, Miles? Not cool.
Other than that, I liked it. It wasn't a major Vorkosigan novel, but it had the things I'm looking for in a Vorkosigan novel: Miles burning up the page, mad schemes spiraling out of control, at least one line of dialogue that made me cackle madly. (Best one in this book is Mark's: "Fuwa-san, let's talk fire sale.")
There may have been occasionally a bit too much "here's what these characters you care about have been getting up to in the past five years" interrupting the story, but it's a fair cop; I do care about these characters and I do want to know what they've been getting up to. Also, Kibou-daini, not actually terribly Japanese. Eh. It's true, but I don't particularly care.
I liked Jin. I don't remember seeing Bujold do a kid point of view before; it's good. If she decided that what she wanted to write after the Ivan thing was a middle-grades book about the adventures of Jin and Mina, I would totally be all over that. (Similarly, if she wanted to write a cozy mystery starring Ekaterin, as one of the commentators at james_nicoll's lj suggested, I'd be all over that too. Neither is likely to happen, sadly.)
I liked Raven.*
About a third of the way through the book I realized that Roic is camwyn, or at least a character played by camwyn, and I immediately became twice as fond of him, not that I had been precisely unfond of him before.
So, yeah. I'm happy. Aethereal Girl says check it out.
*In fact, when he and Roic were escaping from the NHLL, I was briefly quite taken with the idea of Raven/Roic. The feeling passed, which is not to say that I'd object if I happened to come across some well-done Raven/Roic lying around the internet.