The review already posted complains that the characters are 'flat', but on the contrary I found them a diverse and fascinating collection of mostly post-human people of the extremely far future, and given their desperate situation I was engaged with their personal struggles and 'inner life', finding it all quite convincingly nonsoap opera... Also, far from 'drifting along', it was far more reminiscent of a submarine being hunted by an implacable enemy, with all the tense moments of hiding in silence and attempting to outwit the superior enemy.
The alien nano infestation on the hull, which was an emergent 'computer' like none other I've ever read about or heard suggested, was a brilliant furtherance of sf's tropes, and the 'human bomb' that had been created by the aliens from a captured exploratory crew and then sent into human society to spread a cult of charisma, but had been 'defused' by the crew who lived in uneasy alliance with their perverted friend was also a unique furtherance of sf, and a very affecting character in his buried lust to 'recruit' people to his cult, even though he knew he shouldn't, and also couldn't in the company of his crew because they had learned how to 'defuse' him... an extraordinary invention, and a wonderful character! There are so many other wonderful sf inventions in this novel, including the way the alien-altered 'bomb' discussed above was 'hacking' the alien nano infestation through submerging his head into it... sense of bizarre wonder in trumps! I loved this book! Read it!