Mitered corners were the first corners I was taught so I didn't realize you could do them a different way. That being said, once you do learn to do them - you will love them. Lots of good tips are coming on this thread - but I hadn't seen one that said, "If you are adding more than one border, sew them all together first - then you only have one HUGE border to miter instead of trying to match up miters each border.