I saw a demonstration of these on TV recently and the host couldn't tell the difference from the real thing. They brought in the real thing from KFC and Applebee's and did a blind taste test. No one could tell the difference. Obviously making them at home is a lot cheaper, maybe not as much fun, but cheaper.
These folks did a lot of trial and error to get the best match possible.
If you want to give them a try, go here. If you do, let me know how they turned out.