I rarely buy kits or packs of fabric of any kind, although I do like the BaliPops and have purchased a few of those. I think half the fun of making a quilt is looking for fabric after you have decided on the pattern. I love to spend one of my few days off at the quilt store, looking for just the right fabric for a quilt, then getting it home and spending time with it while I'm cutting it for the quilt.
Any time I have purchased precut fabric, even fat quarters, I am disappointed in how they are cut. I have found that a lot of FQs aren't "on grain" and when I try to straighten them out, I lose a lot of fabric. So I feel in the long run it would be cheaper to buy the fabric off the bolt, and get a little extra to make sure I can get my fabric on grain, and still have what I need for my pattern. Plus, I always buy a little more than I need, so if I don't get around to making the quilt right away, and I need a little more fabric, I already have it and don't have to go searching for more of something that is sold out or not carried any longer. And I have the added benefit of having leftovers for scrap quilts later on.
Diane in Colorado Springs