I realised a couple of weeks ago that I had never actually finished this one. A gap in my Banks reading had to be addressed. I powered through it this time but I did think it was merely one of his average ones. As it has an unreliable narrator thing going on (a trope Banks has used before) I was irked. I prefer my stories to have their own internal consistency. I enjoyed this in patches, some of his observations and sequences were very well done and the logical implications of a multiverse well teased out. However, overall, the plot didn't really work for me.