Formal:
* The chef's impeccable timing ensured each dish arrived at the table perfectly cooked.
* The scientist's impeccable research methodology ensured the results were accurate and reliable.
* Her impeccable manners made her a welcome guest at any social gathering.
Informal:
* My grandmother has impeccable taste in clothes – she always looks stylish.
* The musician's impeccable guitar skills left the audience in awe.
* The detective's impeccable intuition helped him solve the case.
Figurative:
* The dancer moved with impeccable grace and fluidity.
* The artist's impeccable attention to detail brought the painting to life.
Note: "Impeccable" is often used to describe something that is flawless, perfect, or without any flaws.