Well, I'm just too trusting it seems. I had a charm pack from a major manufacturer and- so trusting- I just started sewing them together for a table runner pattern. Got to Row 2 and ah,oh, they didn't match up! Had to rip seams and turn some squares so they were all running in the same direction. From now on, no matter how much I trust the name brands, I will measure for "square" before I start piecing. (These charms were approximately 5" x 4.9"- close but just enough to not make a square.)