_THIS_ It's hard to dumb it down enough for a non-technical user to do anything useful (in which case their tests are frequently invalid in a functional sense

_THIS_ It's hard to dumb it down enough for a non-technical user to do anything useful (in which case their tests are frequently invalid in a functional sense even though they're syntactically valid). But by that point you've usually dumbed it down far past the level a competent QA engineer should work at.