I have brought about three apps I am really not happy with as they don't do what was on the box or they are basically not very good and imo over sold. apple should really introduce a 2 (??) day cooling off or demo period so you can decide to either keep or give back the app. As the app store is so tightly integrated with your itunes account and iphone I'm sure they could think of a way to delete it off your iphone and itunes account so there would be no risk of copying it. I am now extremely cautious when I buy apps as the developers spin a lot of garbage to try and sway you to part with your few dollars. OK only a few dollars but it adds up. I would rather pay double knowing I had the option to test it before I commit to it. I'm sure this would push up the general quality of the apps too as now its "well what do they expect for a dollar"