Agreed with TheGreatOne. The trackball took me a few days to get used to when I first started using a Blackberry. Give it a few more days, if you don't like it, take it back and try perhaps a Storm for a touch screen experience. Sure would be nice if the new trackpad Tour2 (Bold, or whatever it's gonna be called) would appear.
Just got a black berry Tour 2 days ago. I hate the track ball. Too hard to click on it.
If you don't like it take it back now, find something else you like. I went to the Palm Pre Plus from the Blackberry, I love it. The main thing is you don't want to get stuck with a phone you don't care for, you have 28 days left! good Luck