This is great. I've attempted to make PDFs of the website I run using OS X's print to PDF function, which always screws up the background color, placement of certain boxes, comments, etc., regardless of the browser. Your service actually created PDFs that look just like the original AND are text searchable.
What are your plans for the service?
EDIT: I just noticed something: Advertisements are not preserved -- there's just a blank spot (with the background color of the page) where the ads should be. It's not a problem for me, but may be for others.