We have used Samsung laser printers for a few years now, going up from CLP 510, 620, and now the very disappointing 680. The A5 printing is very slow and usually ends up with me on my hands and knees most of the time unblocking paper jams in the exit area and inside the machine. So frustrated with the machine I often revert to wasting a lot of paper and printing on A4 instead, which gives little problems. We print 100's delivery notes each day on A5, so this is more than a little frustrating!! Buying and running costs fairly reasonable, but give me back my 510 any day!!