Fat quarters are a great way to get a lot of variety, and if bought in sets, they are already coordinated for you. The cost seems to usually be just slightly higher than yard goods. You can figure cost per yard by simply multiplying the cost per fat quarter by 4. The disadvantage I see with them is that you are limited to the size of pieces or strips you can cut from each one. I love seeing beautiful stacks of coordinated fat quarters, and sometimes buy them, but usually I stick to yard goods because I tend to mostly be making queen size quilts right now.