Go in with an open mind and say "please tell me everything you hate about this product" and if they're shy keep poking. Could this be better? Is this easy to do

Go in with an open mind and say "please tell me everything you hate about this product" and if they're shy keep poking. Could this be better? Is this easy to do? Would you naturally think this sequence would happen? Don't preface it as "feedback" preface it as, what don't you like about this?