I typically don't buy any precuts but will sometimes buy FQ when working on something that needs a more scrappy appearance (think Bonnie Hunter mystery quilts) and just don't have enough variety in a certain colorway. I've also done a couple of quilts that the pattern has you start with a bundle of FQ and both worked well. One caution--on one of those quilts the FQ needed to be trimmed and some of my FQ were a little short of the 18x22 needed to square up the FQ and still get the correct amount.