I have EQ5 - don't feel a need to upgrade. I use it but certainly not to it's full potential. DH bought it for me for a gift at the time. I agree with Peckish as to auditioning fabrics/colors; changing settings, etc. My favorite part is the yardage estimates. BUT for some of the yardage estimates are way over - you can tell they just look wrong. In that case I re-calculate myself and add a bit. Then again, I always add extra for any yardage estimates so I don't run short when I make cutting/sewing errors. Cuz it seems I always do at least 1 per quilt!