I recently received a kit as a gift. It was a Storm at Sea with 24 fabrics! All were pre-cut by laser. The smallest cuts of fabric I would have been able to buy is 1/8 yard for each. So for about $50 that was a great buy! And while not truly "easy" it sure went together nicely!
Its also very good for beginning quilters to learn some of the basics. That said, I haven't made up a kit for years but did enjoy it!