Not to nerd snipe anyone (I'm having to stop myself as I write this) but couldn't you gather the star ratings of all of these sorts of repair centers/stores and

Not to nerd snipe anyone (I'm having to stop myself as I write this) but couldn't you gather the star ratings of all of these sorts of repair centers/stores and get the overall average? It could be used as a sort of proximate net promoter score and we would be able to more objectively talk about the differences in quality...