Even without access to Direct File since I wasn't in a pilot state, I've been using the IRS' "Free Fillable Forms" for the last few years and they've worked great! They don't hold your hand as much as the paid software but for my returns they've been more than adequate and free!
Does anyone know how "Direct File" differs from the "Free Fillable Forms"? Does it hold your hand a little more and help you find credits/deductions? Free Fillable Forms worked well, but only so long as I knew what I needed to file. New circumstances, like adding a dependent, lead to a lot of research.