*** UPDATE - July 11th, 2019:Roughly a year later, and the upper right corner of my screen cover was badly cracked during a fall, but it definitely did its job; my actual phone screen is completely unharmed. I just went through replacing the cover with a fresh one -- the process went even more smoothly the second time around, and my phone looks brand new again. My one complaint is that when I removed the cracked screen cover, it was very hard to keep harmful glass dust to a minimum; naturally, the cover cracks as you peel it off, but that sent a flurry of glass dust across my counter. Luckily, I had laid my phone on a damp paper towel because I assumed this might happen, so that helped to collect the dust and keep it's radius to a minimum. Overall I still definitely recommend this cover! ***Original Review:I just finished installing this screen protector and while it was a tad nerve wracking due to my perfectionism, it wasn't difficult and I'm thrilled with the results. The cover is nearly indiscernible from the rest of the phone and truly looks as if it's part of the original design. The performance of the screen itself is in no way inhibited either; it's just as responsive as it was before the cover was installed, and feels great to the touch.I was able to install it with no bubbles or flaws of any kind. I pulled up the instructional video and did the installation at my desk, following along with the video and pausing where necessary. I was very careful through the entire process and had it fully installed in about 10 minutes. Here are a few notes / tips based on my experience installing this for the GS9:1. If you have the Bixby key enabled, be mindful of where you insert the absorption pad on the left side; if the pad is against that key, it will cause your screen to turn on every few seconds during the installation. This is distracting and can also make it difficult to properly judge whether the glass is aligned with the edges correctly before you adhere it.2. Once you have the glass positioned over the adhesive, but BEFORE you tip the tray and remove the pin, really, REALLY check that your edges are aligned, ESPECIALLY if you want to use a body case with this screen cover. Based on my research, the variety of cases you can use with this cover is mostly dependent on ensuring that you have the glass perfectly centered and not too close to any edges. I paid close attention to aligning the two tiny dots at the bottom of the glass with the two notches extruding from the frame of the top tray in the same spot, and that was a huge help.3. Carefully clean up any leakage before the first curing! There are two parts to this: A) Leakage into the tray. Based on the way the instructions and FAQ on the Whitestone Dome site were phrased, I thought that it wasn't a concern if there was leakage into the sides of the tray - in the gap between the top and bottom trays - when it came time to cure with the UV lamp. Nope. Some of my adhesive had leaked into said gap and after the first curing, when I went to remove the top tray as instructed, it was a bit stuck! Luckily, since this was the shorter curing time (15 seconds) it hadn't fully set the adhesive, but I cringe to think I may have had a situation on my hands in the form of an encased phone, if I had cured it for longer. A little elbow grease and one of the alcohol pads had the trays cleaned up after I had carefully removed my phone. If you see leakage before curing, I recommend super carefully wiping it up without budging your phone, before you hit it with the lamp at all. B) Leakage on the edges of the glass. It's important to be light handed when you're cleaning the phone after the first curing and to only wipe from top to bottom with the alcohol wipe, very gently. RESIST the urge to press in hard along the edges or use your nail to remove any excess adhesive that might be sticking out; messing with it too much can result in your glass changing positions, or you ending up with gaps where the glass isn't fully adhered, and these will be glaringly obvious when the screen is on because they'll reflect light back. Wait until after all the curing to do a final clean-up.4. Put simply: take a breath, and take your time. Yes, this is a bit of a process and it requires some detail-oriented patience, but if you're thoughtful about everything you do during each step, it will turn out perfect and you'll have an amazing screen cover.