It's sad to me that some people view following time-tested instructions as simplistic or as "spiritual materialism". For instance, let’s say that someone wants to learn how to assemble a car engine. Would it be considered to simplistic to reach for manual for guidance? I know nothing about cars, so I’m pretty sure it would take more than a few lifetimes for me to learn how to build an engine from basic parts. With that it mind, it makes perfect sense to use the wisdom provided by accomplished masters in order to progress along the path and chart that progress along the way. Step-by-step instruction isn’t sexy, but it IS effective.
I have not been meditating for as long as many (if not most) of the Dharma Overground participants, and my accomplishments a low-level at best. But ever since I began really looking at maps of meditation (specifically from MCT

my practice has become much progressive and effective. I am on the edge of some new territory that I don’t think I would be able to have understood if it were I was going if it weren’t for the generosity of the more advanced practitioners I’ve been able to interact with through writings and here at D.O. Now that I have an idea of where meditation can lead, I am even more dedicated to continue to practice hard.