I completely agree: the Kindle edition is pretty much a disgrace. The odd typo I can take on the chin, but the in-cessant hyphen-ation makes it look like those dreadful old books for teaching children to read. It's not as if we get these e-books for nothing and so can be fobbed off with any old rubbish.
Having said that, of course, the book itself is very far from rubbish, and a characteristic example of Banks' fondness for drastic switching of registers. One minute, feisty, over-sexed, ball-kicking female characters and weird, exotic cocktails of staggering potency; the next, savage violence and terrifying cruelty and death; the next, poignant, ruined loves; the next, a kind of nature-mysticism. It's a risky strategy and it doesn't always come off. It may be the lack of galactic perspective that makes this particular book seem a bit overstuffed (despite the description, it isn't a Culture novel): could a single solar system really contain everything that Banks so recklessly and hyper-imaginatively flings into the mix? And I have a feeling that he's enjoying himself so much that many sentences are just a bit too long (know the feeling). But it's certainly an enjoyably bumpy ride. And the two lead females give pretty good sass.