We have had a DC615 and currently have a DC645. Used daily and very handy. The best feature on these machines is creasing of digital printed cardstock. Minimal cracking after folding (elsewhere) is important for a superior folded card. We use the Duplo a lot, but it is not an all purpose machine. We make a lot of greeting card type product and it is ideal for that. Lately we have been doing a lot of notepads and the guillotine cutter is better for those. So, it is a bit dependent on what products you make most often. But, as pointed out earlier, loading and walking away makes it very productive, if not very fast.