I'm not a big fan of trackpads. I think they are a necessary evil for laptops (although for mobile devices, I still prefer IBM's TrackPoint) but they are my least preferred pointing device. Recently, my Apple Magic Mouse started giving me tracking problems (completely stopped tracking on my wooden desk, doesn't track on bond paper or mouse pads, but it does track on shiny cardboard packaging only)
While Apple is running diagnostics on my Magic Mouse, I didn't want to buy a cheap mouse nor did I want to waste money on the Magic Trackpad. I did find a better solution: iTap Mobile's Touchpad app for iOS. (And recently, they added an Android version as well! Yay!)
Basically, it turns your iPhone, iPod Touch, and iPad into a wireless trackpad and keyboard. If like me, you use your computer on your LCD TV, having a compact, wireless keyboard & pointing device comes in quite handy for watching movies, controlling media playback and couch surfing.
So, until my Magic Mouse is fixed, I'm using this as my primary trackpad on my home computer. It works on both Mac and Windows, controlled from either iOS or Android!