Put one on my matte LCD and it was never an issue visually and saved me from scratches.

Made me realize the matte screen was pretty pointless to me and got a glossy OLED to save some money.

Just here to say: Make sure they are made for the new OLED version. My old LCD thumbsticks no longer fit on the new OLED version. So they aren’t exactly interchangeable if they are on the tighter side

Got the dbrand for mine og steamdeck. Came with 2 so I will be installing that on my OLED. dbrand is definitely expensive but their products have been quality and just as a company they’ve been exceptional in customer service.

I can’t speak for the rest of this subreddit but personally I get my roms from the Internet