I don't know about the old Udacity, but I love the new Udacity the way I use it. I load up on topics that might interest me, and run thru them at top speed. I

I don't know about the old Udacity, but I love the new Udacity the way I use it. I load up on topics that might interest me, and run thru them at top speed. I get a quick (and very useful) overview by what appear to be very skilled communicators. I don't think I'll ever go for the project based learning model, too much potential for copy, paste, get reward like Codeacademy. Re Coursera, I've never found a class that held my attention till the end. I don't think they are challenging enough, but good information.