So basically it is NOT a migration then?
I notice the demo did not actually run any proper programs after the so-called migration.  A movie or a song will work on both systems and a browser will work on both systems.  Are they trying to suggest that Windows 7 doesn't have a browser, therefore you have to migrate it from Windows XP?
I personally think that if all your programs and data are usable on the new Windows, call it what you like - but it solves my problem.
As for the movie - you'll have to ask the director  

, but do you really want a demo to start up Photoshop? It'll take forever. 
From the reviews I found, the software seems to actually work. Here's the epinions: 
http://www.epinions.com/reviews/Zinstall_XP7_epiAnd, again, they do have a refund policy. You can probably always find something that doesn't quite work and request a refund on that basis if you aren't happy 

 Though they say it's no questions asked, but can never be sure these days.