I have been using the U-Green CD-slot phone car mount holder for about 2 weeks. Here's my 2 cents view. The U-Green smartphone mount is cheap, sleek and a small-sized smartphone mount. It's not the best out there and comes with some drawbacks, but it's cheap and well-built. The smartphone does wobble when the car is going over harsh and bumpy roads. The biggest problem is the mount can slip out of the CD-slot when I try to mount my phone. A little diy Here's an easy DIY that will solve those two issues, wobbling and slippage ( out of the cd-slot). Since I don't use the CD function, I used a acrylic double-sided tape on the rear side of the mount. Now, the wobble on the mounted smartphone is hardly noticeable. It is better to use a good acrylic double-sided tape with high heat resistance. Good ones will last a long time and secures it well. And can be taken off without much effort leaving little residue on most surfaces.