These are so cheap and SO EASY to put on. I had tried Zagg before and they are very difficult to get on. These are not stretchy or sticky, but adhere more with a "static" type of cling. Easy to re-adjust and align if you start to mess up. Bubbles are nearly non-existant. They are so reasonably priced, I replace mine every 6 months or so to keep a fresh look. Highly recommend!