I'm sorry you're having trouble downloading, but I can assure you it's not the quality of the product. I just downloaded the unit and everything is intact. I'm so sorry for your inconvenience! If you're working on a Mac, you need to open the file in READER and not in preview!!! Also, check out this post for more troubleshooting issues: http://ericabohrer.blogspot.com/2012/05/trouble-opening-tpt-files.html
If none of this works, please contact the TpT help desk! Thanks!