[QUOTE=I wind 4 or 5 at a time without having to unthread the machine.[/QUOTE]
Exactly why i bought mine as soon as it came on the market. I even paid full price ...it was an impulse buy, I saw it at a quilt shop and ad to buy it and I have never regretted the purchase. I have janomes.
Maybe you should ask yourself "why" you are asking if you should buy one. And, yes, your satisfaction with the purchase may depend on what sewing machine bobbins you will be winding.
Sandy