Another reviewer claims this is Robin's weakest record. I'm sorry, but with all due respect that reviewer is talking out of their... hat. :-)
The Man Left In Space is one of my favourite post prog records. I'm only a few listens in and I think The Unreasonable Silence matches and even possibly exceeds that work. It has a lot of "hairs on the back of your neck" moments, which is always a sign of a significant record for me.
(Update Sep 2016: best album of the year for me, so far.)