I've never tried a quilt because I'd heard people say that they run out of fabric (yikes!). Lately I've been doing BOM's and I get a package of fabric with no clue to what goes where except to use the picture as a guide. The fabrics are not the same ones in the picture and so I choose what sort of looks like the picture. Pretty confusing. I ran out of fabric for the one I'm working on now, but had plenty in my stash to work with.
I guess the point is that if you're going to do these sort of kits, you'll have to be prepared to be flexible. Otherwise, you'll find yourself pretty frustrated.