I hate touch pad stuff, so at first, it was a bummer for me that they didn't keep the trackball. But I have found that the ofn touch thing has two advantages.
1. You can click on it and it works as your left click.
2. I've read reviews that advises the use of CLICKLOCK from your pc mouse setting. With clicklock enabled, you can drag and drop and highlight words all using the ofn. Without clicklock, you would need to use two hands, one hand to hold down the actual left click and the other hand to swipe the ofn.
This thing has been awesome! Highly recommend it.