They are drivers that are in development, and are less fully tested than the release ones. But they have extra features. It's a risk, and it's up to you to decide if you want to use them. But typically, if you want to run the latest games, then you will use them. If all this sounds a bit pessimistic, it's just because I think that users should realize that they cannot expect too much from drivers.
All cards have driver problems.
Even the most well considered cards have compatibility problems. That doesn't mean that you should just ignore these problems. Describe in as much detail as you can what the problem is. Go to sites dedicated to the chip, and try to find out how to solve the problem, and which drivers work. If you really be nice to others, even start a FAQ page.