I have been using sheets as backing for several years, and get along fine. I either tie or hand quilt my tops. When I started in guild 9 yrs. ago, it was "preached" not to use sheets, but to go buy more fabric for the back. We just happened to have a quilt shop in town then. Well, that worked for awhile, but it wasn't so much that there was something wrong with using sheets as it was to support the quilt shop. Now the guild says it is fine to use sheets. I think it is something that "comes and goes." Guess it has "come" again now! Mariah.