I have a Bernina 630 with the embroidery unit. I pretty much only use the embroidery for making quilt labels but if I decided that I want to do more embroidery, I would want a separate machine for that. You have to stay close to your machine while it is stitching out and I would prefer to sew something else while the EM is running. It does take a few minutes to change out the needle, foot, plate, rethread bobbin differently, drop the feed dogs and un plug the foot pedal. I tend to wait until I have a couple projects to do before I change everything out.
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My newest Grandson, Caleb Austin, was born May 29th. I am now Grandma to 4 precious babies. I am so blessed!!!!