I just go on the taste alone.
First in the line-up that can make or break the coffee is the barista or lack thereof. There are lots of cafes that dont have a well known brand name of beans but if the beans are fresh and they have a good barista it will be good coffee. I have had excellent Vittoria and Lavazza at cafes. I have had a brand name coffee that I have taken one sip of and got my money back. Yes Tobys is certainly good as they have proper baristas making coffee from fresh beans. And some cafes are inconsistent and its a lottery.