Fantastic product... I've been using this as a production manager for a service bureau for over 2 years, and the last bugs (especially with bleed interface with our Harlequin RIP) seem to have been taken care of. It's not only useful for printing, but also to make printer spread PDF proofing document files, which turn out wonderfully. The note by Martin Turner, below, is correct in that it tends to crash when used with OS 8.5 - as I was at first - but from 8.6 on seems to work like a dream. Fine work; good price!