Review on 📱 Non-Slip Cell Phone Pad: Universal Car Dashboard Holder for Smartphone X/8/7 Plus, Galaxy Note 8, S9, S8 Plus, GPS Devices & More - Anti-Slide Silicone Rubber Gel Mat with Secure Grip for Sunglasses, Cards, Coins by Rob Madden

I bought this tray not so much as a phone holder as to mute the overwhelming volume of the center speaker in the dash of my 2020 Subaru Ouitback with HK sound system. For that it works PERFECTLY. The sound field is now spread across the dashboard and separation has been restored. The difference is very noticeable. As a bonus, the tray adds much-needed storage capacity in the cab. I didn't bother to glue mine (using the two glue tabs at the bottom) but it still stays in place. There is no slip at all. The color matches well too. I'll give this 4 stars just because it won't hold my phone (in a case with a 5.7 inch screen) unless flipped onto the dashboard. I don't care though as it's great for storing glasses and other small items AND has worked wonders for my sound system!