Welcome to the Apple iPad Forum, your one stop source for all things iPad. Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
Best thing to do is to find ones with good reviews. I suspect that each CCK will be slightly different and might work accordingly. If you find a knock off with good reviews, you're more likely to find a good knock off.