Karina, if you want a very productive and useful application, take GoodReader from iOS for iPad and do all features that program have.
But do not do a "fantasy" file manager as iAnnotatePDF (the second best PDF utility in iOS).
I'm currently not using my ICONIA TAB due lack of a good PDF Viewer/Annotator. RepliGo seems good but it lacks some essentials features like margin cropping...
When I go gome I will purchase your application and test it. I would like to do now at work but my Iconia has exhausted the battery. I forgot to put to charge last night.