Megan McArdel with a smart piece on Dave Ramsey. My wife and I have listened to him, watched much of his talk, read books, etc.
The most important aspect of Ramsey, IMO, is your relationship with debt. Many people carry some debt, but certain debt is stupid, frankly. There are people who carry debt because they would rather have the cash in their bank account (not making money) and then pay minimums on their credit cards even though they have enough to pay off their balances. Stupid debt.
But Dave Ramsey is much more than that--re-examining how you utilize budgeting (first, by placing a budget in its proper place as a record of what you spend your money on rather than a wish list of what you should be spending money on), how you save, what is important to save, etc. He's worth a long look by people not because you should buy into his system (literally), but because people sometimes need a real look at their own finances and Ramsey offers an easy yet bracing way of doing that.