The best shop is the one that tells you where ceramic stops. So here it is: a coating is a slick, hard, hydrophobic layer about one or two microns thick. It fights UV fade, bird droppings, road film, and winter brine, and it makes washes dramatically easier. That's real value on a car you're keeping.
What it does not do is stop a rock. It has no impact absorption — gravel off Deerfoot or Stoney Trail will still chip your paint right through it. Anyone selling ceramic as "rock chip protection" is either confused or hoping you are. For impacts you want Paint Protection Film, which is roughly 200 microns of urethane built to take the hit.
For most Calgary drivers the smart setup is PPF on the front impact zones plus ceramic over the whole car — film where the gravel lands, coating everywhere for gloss and easy winters. Not sure which you need first? Our PPF vs ceramic coating comparison breaks it down, and I'll give you a straight answer at quote time.