You don't need to buy your screen protector at BB but if you have never installed a screen protector of this type let me offer that it can sometimes be as easy as trying to put Saran Wrap on a dish in a 40mph wind. Although you WILL be able to purchase less expensive screen protectors, I've found that since I only put one on every 3-4 years that it is easier to buy it at BB and ask the staff to put it on for me since they put them on multiple times each day!