Thanks Mike for you thoughts on the human interface side and to xdave for the best photo of the machine I've yet to see. These machines include SMT's newest GUI which looks promising. As part of the back and forth dialog before purchase, I received some JPEG's of the interface which includes the one xdave has on on the screen in his photo and 4 others. And for Mike, I would mention that there is a photo in the SMT880 spec that shows a graphic depiction of the circuit board which should be included with the SMT660. I'v been told the SW is the same.