Through the years I have purchased embroidery, counted cross stitch, crochet, and now quilting kits. For the most part I am quite satisfied. Once I did not have enough of one of the threads, e-mailed the company and they sent me what I needed.
One of the first quilts I did was a Turning Twenty kit. Only one piece of fabric I would not have chosen, but I did use it and from afar I cannot tell I don't like it. I have another kit sitting in the drawer for a Watermelon quilt that I was not able to get to this summer. Summer was too short!
All in all quite satisfied with kits. Sometimes I just don't want to choose the fabric myself.