I just published my weekly blog article on new headers in Mathcad Prime 1.0. You can read it here The Mathcad Prime 1.0 worksheet with a sample header is attached.
I am comfortable in using Mathcad R15. However, I have a problem with Mathcad Prime 1.0 (and 2.0 as well) for which I can't start using prime versions for my calculations. I need text blocks or text boxes to have math variables (or text with subscripts at least). This makes my regions look very formal. But this is not possible in the latest prime versions, and I like Prime versions otherwise.