This flight has been an amazing series of accomplishments for SpaceX. They've previously launched ONE Dragon to orbit, basically empty.
Now they launched Dragon on the Falcon-9 booster, orbited, maneuvered, berthed with the ISS, had no interface/interior concerns, unberthed, and re-entered. All without any major issues. (One launch delay due to a faulty valve that was automatically detected by software; one delay on approach due to a reflection confusing a ranging sensor.)