Has anyone picked this up? I have already decided that I'm going to buy it (I love the NYT's crossword and travel a lot with both a DS and a book of NYT CWs, plus it has been getting good reviews), but what I'd like to know is if I should pick up a new one, or hold out for a used copy. Does the game automatically save which puzzles you have and haven't completed? If so, is it hard to reset this information? Is there anything else odd like that that I would need to know?