If you work or use your laptop in a dusty environment, and if you're very particular about keeping as much of that as you can out of the keys, then this is probably what you want. Some caveats and things to know up front (speaking only to how it fits on a 15-inch MacBook Air M3): - Yes, it changes how it feels to type on the keys... because it's a cover that goes over the keys. After a month, I've gotten used to it, but you need to weigh your tolerance/adaptability for this versus how badly you want to keep out dust. - There's no "break-in" period where the thing gets softer or more pliable because that doesn't make sense -- the TPU (i.e., material its made of) isn't going to change properties on its own. - If you value the original feel of how it is to type on a MacBook keyboard more than anything, then this isn't for you. I didn't bother using the adhesive stickers that came with it; the cover stays pretty well on its own and I'm not sure what other people are doing where they're having it slide off in the middle of typing (e.g., rolling your fingers when hitting the keys? What?) There's no trick to installation; you simply lay it on the keys and it stays in place. Also remember this: Apple says "remove [any sort of keyboard cover] before closing your display to prevent damage to your display". That said, I've closed the lid with it on plenty of times -- it closes just fine -- and I haven't seen any marks on the screen. I also wipe off the cover with a slightly damp cloth to get rid of any surface oil or dust, and I don't bash the laptop about, or press on the lid, or pretty much do anything that would mash the glass against the keys in the first place. Washing it is easy. Just gently press your finger on one of the corners, like the 'esc' key', drag the finger a bit, and the cover lifts up easily. Rinse it, let it dry, and you're done. Overall, I give it five stars: it does exactly what it's supposed to do, and it's sturdy enough that it doesn't flop about. It absolutely does change how it feels to type, and that's a tradeoff you need to decide is worth or not.
