I'm not sure mine is the same brand, but I definitely like the one I have. There is a knob to lock the mount in the CD player. There is another on the back to tighten the holder for horizontal and vertical position. I have to tighten this from time to time otherwise the phone tends to tip forward or wont stay vertical. Its been a great mount for me since I don't have a flat surface in my car other than the windshield.
I'm having problems finding a good place in my car for a mount and fighting put which one to get. I have a 2013 Ford Escape and there isnt any flat surfacea for a suction cup type mount. I'm not sure if one that goes in the cd player slot will even work.