Absolutely, I've made one trade on it myself and it went through with no problems. And I am also very much helping to improve the software. Little by little.
Edit: The official client will never be done. It will remain for testing purposes only because the developer does not want to run a network for legal considerations. Look for Samurai to see a good reason why.
Edit: At absolute most, the official client may allow you as the user to input which network you would prefer to be on, but they will never run a network themselves.