So I read all the reviews for the different screen protector options available for my new Fitbit Charge 4. All of them seem to have some negative comments so I ordered two types/brands. I waited more than a week before attempting to apply for concern of it being difficult to apply but finally watched the video & thought how simple, why did I wait? I would definitely watch the video it tells you exactly how to find the video & explains step by step instructions well. I followed the instructions as shown and had absolutely no issues. I will say I checked it about 8 to 10 hours after applying & I did see a couple of air bubbles, they were not bad but would irritate me if they remained but I let it sit as instructed and after 24 hours they were completely gone. You really can’t tell that it’s on. It’s perfectly clear, aligned perfectly & looks just like original screen. I’m about 2 wks (or close to) since applying & so far It’s perfect. No complaints. Go for it, you won’t be disappointed! I will say when you charge it you have to make sure it’s positioned just right but think it may be more of how the Charge 4 is designed vs. because of the screen protector but it will charge & not a big issue.