The key to using this device is the need for two flat surfaces otherwise is not going to work because of the use of suction pads. This handy little thing is highly portable because it is only an inch thick, two and half inches long and it comes with a handy case to carry it around in.
Here is some more information on the cool Aphix stand for your Smartphone;
A simple, adjustable, one piece holder for your technology. Mount your phone, iPod or other electronic device to most any smooth surface. Its three links allows you to hold the device flat or up to an angle of 50 degrees in any number of orientations. Throw it in your bag and use it on the go.
This handy portable stand for the iPhone comes with a $18 (£12) price tag.