I totally agree with Emmy and Romanojg. Really the most important feature is the end result, quality of the stitching, and of all the Sergers I have ever used, Babylock gives the best results, perfect stitches, but to top it off, the BL threads the loopers with the push of a button in the blink of an eye. Then you also end up with the most Professional stitching. Like Emmy said about the Babylock Serger....."You choose whatever stitch you want, thread it, and every stitch is perfect. To me, having perfect stitches so easily was the deciding factor, not the threading". EMMY said the only time she ever does a sample is to try different thread combinations and I agree. Professional results every time.