I'm not in a position to know myself, but Patrick (author of the blog post that originally kicked off this discussion) does not think highly of The Motley Fool.
The only other data point I have to add is that a year or two ago, The Motley Fool published a breathless blog post announcing that 3D printing was about to destroy Chinese manufacturing, and that everyone should invest in companies that make 3D printers or CAD software.
They are a "diversified financial brand" which does a lot of e.g. telling people to get out of credit card debt (a good idea!) and save for retirement (a good idea!). Then they also tell people that "with just a little work, you too can read company numbers and outperform the stock market" (a really bad idea!) and "if you want to do less work, buy our newsletters and we'll give you picks which mumble mumble maybe mumble mumble will make you into Warren Buffet" (a really bad idea!).
Hit this link: http://www.kalzumeus.com/2013/04/24/marketing-for-people-who... and search in the page for Motley Fool.
The only other data point I have to add is that a year or two ago, The Motley Fool published a breathless blog post announcing that 3D printing was about to destroy Chinese manufacturing, and that everyone should invest in companies that make 3D printers or CAD software.