I use sheets all the time and my LA'er friend has absolutely no problem with them. In fact she likes them as there's no seams to twist and her machine just powers through them. I machine quilt on my old Singer 201 or Janome 6500 and they don't complain either. Sheets wash and wear well and don't bleed. I can buy a flat queen sized sheet for less than $10 if I look and save my $ for the stuff I need to show on top of my quilt!