I'm using a kit for the 2015 BOM on Craftsy & this is my first quilt kit. I am scared blue every time I cut another block for fear I'll make a mistake in cutting and not have enough fabric to finish. At this point, I can tell you I prefer buying yardage so I can get an extra 1/2 yard of each fabric in case of errors. I have no idea how much they included in case of errors. I am more comfortable with yardages, but sometimes it's fun to go outside of your comfort zone!! ;-)