Their guide is excellent for setup/configuration issues. Their acoustic advice though, is completely wrong and old school. I tried to explain that to them when that thread was created but there is a click there that created the thread and doc and they were absolutely resistant to anyone telling them otherwise.
Here, hear...
I have a personal (family) emergency going on so am not able to do this justice. I will just say that I read the guide mainly for how to run REW, not really for acoustic advice. Frankly, I am not an expert on small-room (or large-room, for that matter) acoustics. I know just enough to know I don't know enough. It is a very tricky thing requiring IME a healthy dose of experience with in-depth knowledge of time- and frequency-domain analysis and knowledge of how/when to apply each. I do tend to place much more weight on time-domain response; frequency plots are easier for most to understand and interpret but all too often provide a woefully incomplete picture of what the system really sounds like. But, obsessing about time-domain tails and delayed impulses can also be counterproductive.
IME/IMO the tools have often outstripped the average user's knowledge base (in many areas). Giving a layman a scalpel will not make him a surgeon. Self-taught often means you've had a very poor teacher. Insert your favorite cliche here. That goes for me, too, and is why I tend to not comment beyond the basics or my direct experience on acoustic theory. Those grad classes were long ago...
IME, IMO, FWIWFM, YMMV, my 0.000001 cent (microcent), YMMV, etc. - Don
p.s. My room is very dead, intentionally, but is OK with me. Probably partly philosophy, a little taste, partly big panels provide a big sense of space, and partly experience in very dead recording studios ages ago means I can tolerate such a room just fine.