I'm not really sure what to make of this book; it has a good plot and wraps everything up nicely. His writing, as in the previous ten or so books, just seems to be a bit loose and lacks the depth seen in, say, the Serpentwar Saga. To be fair, maybe I shouldn't have read the Empire series for the first time just before reading this book...!
I thought the ending was great, but there were no real surprises. Macros mentioned the nature of time in the void way back in Magician, whilst Nakor's ramblings during the Serpentwar saga formed the basis of the lore involved. An enjoyable read.