What is Reddit's opinion of Reading Koine Greek: An Introduction and Integrated Workbook?

From 3.5 billion Reddit comments

I'm currently learning Koine on my own using Reading Koine Greek. I started with another and also watched the free lessons on Mounce's website, but what sold me on Decker's book was how highly regarded it was on the BGreek forum. And I know why. Decker focuses on reading rather than rote memorization (there's some of that, but not the massive charts like Mounce). I'm about halfway through and I'm able to read quite a bit (by parsing nouns and most verbs and looking them up in a lexicon) in the NT.

EDIT: Also, don't be afraid to ask this same question on the BGreek forums, /r/Koine, and /r/ancientgreek.