What do you mean by SF approved though? Some brands that would be considered "SF approved" Such as Kiton, Brioni, Tom Ford, Attolini, etc are well liked on this forums but at the same time get a lot of flak for having terrible price/quality ratio. It seems they are only smiled upon if found on deep discount. Personally for myself i have a mix of both I.E finding a Brioni suit at century 21 for $800, as well as paying full retail for a TF suit. Then again this would not apply for the SFers that believe in bespoke only for that price range which i also have in my wardrobe (Steed, NSM). SO basically your question is pretty hard to answer because this forums is so split on certain issues. But in answer to your brand only question, i do have some stuff from Zara and old navy that i wear pretty often. They are a minority but if you look at the amount of time they spend in rotation as opposed to my "SF approved" items i would say i use them very often.