I own several whole cloth quilts. Yep ..imports.. but they are wearing well .. hard to go wrong with just a single piece of fabric that has stitching about every 3/4 of an inch. I use them as a bed spread then a "real homemade quilt " over the top. I love whole cloth quilts... and figure that the only way I will ever have that look.
I don't own any purchased pieced quilts. I was given a pieced quilt ( cheap import) about 20 years ago... it did not make it through the first wash without coming apart. On examination... there was almost nothing for seam allowances.