First impressions very favourable. It look beautiful, very clean and sensibly organised. Opening pdfs is remarkably glitch-free, the only thing lacking is guides but given that they wouldn't have been exported to the pdf in the first place that seems entirely reasonable. Not sure whether there's any possibility of a smart-gridding feature that throws guides in based on content and once Indesign import comes online it would be largely unnecessary. If I were to make any suggestions it would be merely that the text flow handle was a bit hard to spot at first and possibly a little higher up the text frame than I was expecting. Love the auto pop-up tab bar, but found the manual tab markers a little hard to see on some screens.