>>21439850 (OP)They're not difficulty level whatsoever. Time, not skill.
They are mostly pricey butter, and requires a technique called booking the dough, which basically adds time to the prep. It's something I would do at home on a rainy day, a laundry day/cleaning day. Take it out of the fridge, roll it out, fold, roll, fold, roll. Then back inito the fridge to rechill. Repeat 2-3 more times.
I'd bake on parchment, and an air-pillo kind of cookie sheet which makes it idiot proof from burning or doneness skills.