I loved this book. As it took me a year to get through it, it is not what one would call a page turner.
In the beginning, it was because his adversaries said things that Bellermine could hammer away at mercilessly with page after page of refutation. It was good to see the other side get obliterated, but it could be tedious in places.
Still, it could genuinely be a funny book. Sometimes the enemy would say things so lacking in basic reason or logic, and Bellermine was forced to simply report the gibberish and admit that there was nothing there for him to respond to.
Sometimes St. Robert would have a comeback that was all the funnier because one generally does not expect a saint to react that way.
Overall, I learned a great deal, especially how the original objections to the Holy Mass were not the same as one might expect from a modern Protestant. 500-year-old Protestants remind me a lot more of sedevacantists, and I was certainly not prepared for that comparison.
I would read it again. Probably slowly next time, too.