I spent some time reading the later chapters which are what I'm fuzziest on. It's nice to have the python code there. I do overall think this is a good resource. However, the hand-waviness of the specifics gets to me. The author even admits at one point that there was theory behind choosing specific constants that they won't get into. But they don't say how I can figure that out. Did example, if I know my preamble length and maximum frequency offset, how do I choose loop parameters to lock on within the needed time but stay stable? I have no clue. Would've been nice to get pointed in the right direction.