You can maybe find coupons that still work about 30% of the time if that. Do not bother with using this if you think you'll get rewards from your purchases outside of the standard 1% or whatever your card offers. I've not received a single penny from the rewards offered through the extension. The only redeeming part of the extension and CapitalOne Shopping itself is the price comparison except when it inevitably links to a used product on ebay.