IMO, all these shops are just a 3rd party medium to sell a product. When you buy any brand the warranty is mostly covered by manufacturer unless grey sets. Shops sometime provide inhouse Ext Warranty like BD for up to 4 extra years at a price & peace of mind.
An a consumer you hv all your rights if something faulty there is an 'unwritten rule' all products are guaranteed regardless and you can exchange it within usually 7 days so long as you keep your receipt. Some clever shops print this BIG BIG & use this as a Marketing tool but the fact of the matter is all shops are bounded by this rule.:devil: