Damn what's with all the John and Martha haters. Learning IFR is one of the most boring things out there. I mean when was the last time you saw something about VOR service volumes and thought "COOL!". I'm guessing never. John and Martha are knowledgeable and yes to do splatter their videos with cheesy jokes but it takes off the monotony of actually learning the stuff.
~D
I would tend to agree here, they do keep you interested in the topic at hand. I'm definitely not a 'hater' of their material, I was just going by overall context. I think it really comes down to personal preference and what closely matches how you learn and retain information, not so much, "this one is better over the other because I said so." Just pick whatever you feel more comfortable with and what you think may help you learn the topic better.