I was under the impression that most precut fabric bundles are not meant to be the only fabric you use. That's so you can buy (or find in your stash) coordinating fabrics to add your own personal touch to the look of the final quilt. A lot of precut bundles are made up of dark and medium tones and when used exclusively the quilt has a flat look and you find yourself wondering why the beautiful fabric you loved in the precut looks so blah... It needs something to help the quilt pop (doesn't always mean you need to use a real bright color... but adding some light tone fabrics will do it because it helps to bring out the pattern in the medium/dark fabrics better). And some precuts are made up of very strong/busy patterns and you need to add "tonal prints" to give the eye a resting place so the quilt doesn't "read" as one blurry mess. And, some bundles are only meant to be stash builders.