It holds on too well!! I only have one mount to use in 2 cars and can be a pain to remove. It attaches itself to the vents with little hooks. They also make windshield, cup holder, and dashboard mounts. The last option actually uses the bolt on the passenger's seat to hold the "gooseneck" arm in place. It's made by Arkon. Their website is www.arkon.com. I actually got it from Amazon for $18, but you can buy it direct from Arkon for $19. Shipping is probably about $6.Silver_Slug said:Not directly related, but where did you get the mount for your PDA at? I want to mount mine for datalogging, but can not find a sturdy mount to hold the unit during track days. The one you have looks pretty good. Does it mount solid enough to survive driving?