I buy the Unofficial Guide every year, even though the text hardly ever changes enough to warrant it, and I subscribe to the website even in years I'm not going to Disney. The crowd calendar is great and they're just too good a resource not to use. Since we usually go off season, I've never bothered with the app.
I've also never used their plans beyond the first three or four steps. In the days before fast pass plus it boiled down to: get to the park early, know which are the top three attractions, send someone to get fast passes for the heaviest hitter, then rush to quickly do the other two rides before the crowds show up. After that, the only park you need to continue to think about ride order in the off season is Magic Kingdom, and that comes down to preferences.