I used to have a Microsoft Band. I bought the warranty. It stopped charging. Went in, got a new one, stood in line, exchanged with no issues and walked out the door.
When I turned it in this last time, they did not have one my size, so, I took the credit and bought the Gear 2 Neo. I REALLY wanted the Gear S, but the damn thing needs it's own Voice/Data plan to use and I didn't want to add that to my bill.
I stray, I bought the warranty and will always buy the warranty from them.
When returning an item with warranty, they refund you the item price and warranty price. You replace the device, get warranty again, if the price dropped, you get refunded the difference. If the price goes up, you get it and the price you bought it for. If all is the same, you go out with a NEW device WITH warranty and NO extra cost.
This is why I will pay a little more at Best Buy on some things to get the warranty.