I have the Babylock version of the QC-1000 and it has been a very solid machine, the NX450 and 650 Q are just a step down from the QC but should be very solid machines, and very user friendly. I wouldn't hesitate to buy it. I look at those when I was in the market, but when I found out about the no interest payments I just decided to get the higher model and make payments otherwise I would have gone for the 650Q