I got the book yesterday and read for 5 hours at a stretch, and again got up in the morning and read for another hour and a half. I am more than half way through the book and expect to complete the entire book by sometime around midnight today, and will then post a full review.
Meanwhile, Misra has completed reading the book and you might head over to his blog and read his review. Beware though, it contains spoilers. Also, though I had laid my hands on the ebook on Saturday itself, I waited for the actual book to arrive. Did not want to spoil the fun, and thankfully none of my friends messaged any spoilers.