We call it "no-fail" because you will make a good pie crust every time with this recipe...but ONLY if you follow all the recipe instructions exactly. If you cut corners you risk failure just like any recipe.
The recipe makes a little over one 9 inch pie crust. If you are good at rolling the dough very thin, you can get two crust. However, for a two crust pie it is easier to double the recipe...and have a little left over.