Pros
Fast: Another specific positive aspect of multi-touch lies within the use of simultaneously handled input devices.
Flexibility: A major advantage of multi-touch systems is the ability to adapt them to almost any imaginable problem that it should solve.
Cons:
Occlusion: On the negative side, multi-touch systems complicate the occlusion problem, as several fingers, hands or devices are clouding even more parts of the touch screen than on single-touch devices.
Lack Clear Distinction: What is more, some actions like scribbling notes or making finer drawings can not be reasonably performed with fingers and on small screens