Okay, update. The looseness was my bad - I didn't notice to tighten the knurled wheel on the back. The bad news, I still can't use this for an in-car nav, but not the holder's fault (I don't think.) After much experimentation, I found that if I am not actually holding the incredible, the touch screen doesn't work at all (occasionally it registers a push but rarely.) I proved this by putting the unit in the arkon and holding the arkon in my hand but by the suction cup part. Screen presses not registered. Slide my fingers up the stalk and try again. No go. Finally when my fingers were almost touching the back of the phone, it started working. Some sort of proximity sensor issue?