I do not suggest you buy this product. Every time I tried to attach my iPad to something the iPad would weigh to much and the whole this would fall. In my opinion this is a waste of $80. The iPad doesn't even float in mid-air, it stays flat on the ground. If you are ok with pay $80 for something that you can do yourself for free (stand up the iPad.) then by all means get one. But, if you are a person who wants your iPad to float then your just going to have to wait for the next gadget to come out.
I own six twelve south products and have been delighted with the quality of manufacture, design and utility of all of them. The HoverBar is the first time Twelve South missed the mark and violated their own design and quality standards. The HoverBar is crudely designed and an actual eye-sore. Putting the aesthetics aside, it is rigid to a fault with a very limited range of motion near the clamp. In turn, the engineering of the flexible arm at the joint with the clamp allows the arm to push backward when touching the ipad - even after strenuous tightening. Finally the iPad bracket is cheaply constructed with a ball-in-socket union that is not rigid enough resulting in the ipad "spinning".
The concept was good but TwelveSouth compromised their reputation releasing this. Its low quality on all levels - definitely not TwelveSouth quality.