I probably should have clarified the stitch length, I guess. We're both right. The stitch length varies a bit, depending on the sub-class, and mine is limited to 4mm. There's no easy way of getting it any longer. As for the feed dog, it just seems to me that a none-elliptical travel smooth dog is not going to give much assistance to the material movement - but you could be right, and I could be wrong, if so I'm happy to learn something.
But I still don't think it's the right machine for someone who will only have one (which is why many of us have more than one.....).