Terrible because the link they provide for instructions doesn't work, so you have to figure it out on your own on YouTube. Unclear instructions on the glass and packaging, resulting in me cracking it in my attempt to put it on my phone correctly. I had almost placed it, but it wasn't straight, and in my effort not to cover the front camera, I tried to move it and it cracked, rendering it useless. If it cracks so easily during installation, imagine if it fell and I tested it in real conditions. Unfortunately, I feel like I wasted 15€, which is not a small amount for this accessory.