I cannot speak on the benefit of any if the media that you referenced.
I can say that, although you won't find the information laid out in chapter or chronological format on this forum, you will end up with much more that $200 worth of information if you take the time to read and research right here.
Many of us went to classroom training and/or field training with some of the bigger vendors that offer those things. I still go to the training. Not only for the refresher courses but also for the networking
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