The overall ease of use when creating my own patterns. Also being able to have multiple views at once makes it easy to see what's going where in terms of stitching layout. Not much to dislike really! I've been playing around with this software for quite some time now & love how flexible it can be. We're making custom clothing that requires complex designs which are difficult to create using other programs like Solidworks or AutoCAD. This allows us to do so without having to learn any complicated codes.