I currently have one right now and out of the cases that i have already bought for my device, it's for sure my most favourite.
It's quite slippery as a case, but that doesn't bother me and i quite like it that way. A good comparison would be the Power Support clear cases that are sold at the Apple Store for the iPad Air and iPad Mini. They look basically exactly the same except for the fitting on the devices themselves as the Ringke has 4 cuts on the corners to allow the case to be put around the phone.
It is completely clear so if you don't clean the inside of the case and also your phone before you put it on, youll be seeing every single piece of dust that gets caught in between.
The thickness of the case is also just thick enough to keep the camera from coming into contact with the surface you place your device on. Also the case does extend higher than the screen a bit so that you can place your phone face down without worry. This lip around the screen along with a tempered glass screen protector make a very good combo as you don't notice the lip as much and also the lip is high enough to keep the tempered glass from contacting surfaces also.
If you have purchased and owned one of the Ringke Slim coloured cases for the iPhone 6. Its good to note that the clear version does feel much more sturdy and strong when compared to the colour versions. Theres not as much flex with the sides of the case and the case feels a bit more dense overall.