I think this book is really fun, I think the situation the protagonist finds himself in is quite unique and some of the ideas explored are very creative and kept me interested. The plot also moves along at a steady pace too and I never felt it was dragging too much, even in the slower parts.
However, I did find the main character to be quite cringey. I didn't need to be reminded of certain things over and over again (like mentioning he knew things because of his job) and some of the humour just made me roll my eyes. I enjoyed the science explanations at the start but by the end I did find myself scanning through those parts until he found the answer. 
Overall a fun read, but not without its flaws.